APPSC Polytechnic Lecturers 2025: Lecturers in Government Polytechnic Colleges (Notification 13/2023), Paper II electricalelectronicsengineering

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2.Options shown in red color and with     icon are incorrect.



Question Paper Name :                                                             ECLR10
Subject Name :                                                                   Paper II Lecturer in Electrical and Electronics Engineering
Duration :                                                                       150
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                          Paper II Lecturer in Electrical and Electronics Engineering
Group Number :                                                                   1
Group Id :                                                                       441009731279
Group Maximum Duration :                                                         0
Group Minimum Duration :                                                         150
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Break time :                                                                     0
Group Marks :                                                                    300



                          Paper II Lecturer in Electrical and Electronics Engineering
Section Id :                                                                     441009736928
Section Number :                                                                 1
Section type :                                                                   Online
Mandatory or Optional :                                                          Mandatory
Number of Questions :                                                            150
Number of Questions to be attempted :                                            150
Section Negative Marks :                                                         0.66
Maximum Instruction Time :                                                       0
Sub-Section Number :                                                             1
Sub-Section Id :                                                                 441009739381
Question Shuffling Allowed :                                                     Yes

Question Number : 1 Question Id : 441009800706 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Consider a series R-C network connected to ac source; then determine the source voltage if the magnitudes of the voltage drops across resistor and
capacitor are 8V and 6V, respectively.
Options :
1.    2V
2.    4V
3.    10V
4.    14V

Question Number : 2 Question Id : 441009800729 Question Type : MCQ
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If X and Y (in Watts) are the readings of the two-wattmeter method for three phase star circuit, then the active power is given by
_________________ and the circuit is having a resistive load if ________.
Options :
1.   X+Y, X>Y
2.   X-Y, X
3.   X+Y, X=Y
4.   (X+Y)/(X-Y), X>Y


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Question Number : 6 Question Id : 441009800714 Question Type : MCQ
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Identify the correct characteristic feature of the power curve related to maximum power transfer theorem.
Options :
1.   The power curve is typically constant throughout the entire range of load resistance.
2. The power curve is approximately symmetrical around the bottom peak, with power increasing on either side as the load resistance deviates
from the matching value.
3. The power curve is approximately symmetrical around the top peak, with power decreasing on either side as the load resistance deviates from
the matching value.
4.   The power curve resembles a linear behaviour with rise in power for rise in load resistance throughout its characteristics.


Question Number : 7 Question Id : 441009800720 Question Type : MCQ
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Determine the parameter “C” of ABCD parameter in a two-port network for a T network with resistors P, Q and R. Here P and R are series arms and
Q is the shunt arm of the T network.
Options :
1.   PQ
2.   R
3.   1/Q
4.   P/QR


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Question Number : 10 Question Id : 441009935298 Question Type : MCQ
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What is the apparent power supplied by an AC source if it supplies the following powers to a load?

i) 4 kW
ii) 15 kVAr leading; and
iii) 18 kVAr lagging
Options :
1.   22 kVA
2.   37 kVA
3.   10 kVA
4.   5 kVA


Question Number : 11 Question Id : 441009800765 Question Type : MCQ
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Identify whether the statements related to CUTSET in graph theory are correct.
Statement I: In graph theory, a cutset (also called a cut edge set) is a set of edges in a graph that, which when removed, disconnects the graph.
Statement II: In a more complex graph, a cutset could involve multiple edges.
Options :
1.   Only statement I is correct
2.   Only statement II is correct
3.   Both statements I and II are correct
4.   Both statements I and II are incorrect

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Question Number : 14 Question Id : 441009935302 Question Type : MCQ
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Which of the following statements is/are true with reference to AC circuits?

I. Power factor of a purely capacitive circuit is zero.
II. Voltage across the inductor lags the current flowing through it.
Options :
1.    Only I
2.    Only II
3.    Both I and II
4.    Neither I nor II

Question Number : 15 Question Id : 441009935303 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Which of the following statements is/are true?

I. If a network contains a diode, Norton's theorem cannot be applied.
II. Norton's theorem is applicable to linear bilateral networks only.
Options :
1.   Only I
2.   Only II
3.   Both I and II
4.   Neither I nor II


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Question Number : 17 Question Id : 441009670664 Question Type : MCQ
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What is the capacitance C of a parallel plate capacitor with plate area A, plate separation d and free space between the plates?
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Question Number : 20 Question Id : 441009670795 Question Type : MCQ
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A point charge Q is placed at the origin. What is the electric potential at a distance r from the charge, and how does the potential change if the
distance is doubled?
Options :
1.                ; potential becomes half when distance is doubled

2.                 ; potential becomes one-fourth when distance is doubled

3.                ; potential becomes one-fourth when distance is doubled

4.                 ; potential becomes half when distance is doubled



Question Number : 21 Question Id : 441009670846 Question Type : MCQ
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A uniformly charged solid sphere of radius a has total charge Q distributed throughout its volume. What is the electric potential at a point inside the
sphere at distance r<a from the centre?
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Question Number : 22 Question Id : 441009935311 Question Type : MCQ
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Question Number : 25 Question Id : 441009670972 Question Type : MCQ
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A long solid cylindrical conductor carries current uniformly. What is the magnetic field (B) at a point inside the conductor at a distance (r) from the
axis?
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Question Number : 32 Question Id : 441009801263 Question Type : MCQ
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Which of the following statements is/are correct in relation to the Laplace transform?
a. Laplace transforms help understand and analyze the transient response of first- and second-order systems.
b. The Laplace transform converts differential and integral equations into algebraic equations, which are generally easier to solve.
Options :
1.   Only a
2.   Only b
3.   Both a and b
4.   Neither a nor b


Question Number : 33 Question Id : 441009801311 Question Type : MCQ
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Options :
1.   X(z)=32
2.   X(z)=z^(-5)
3.   X(z)=32 z^(-5)
4.   X(z)=32 /z^(-5)


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Question Number : 36 Question Id : 441009801232 Question Type : MCQ
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What is the Fourier Transform of nth order differentiation of a signal x(t)?
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Question Number : 41 Question Id : 441009800773 Question Type : MCQ
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Which of the given conditions relate(s) to Dirichlet conditions for Fourier series?
a. The integral over one period must converge.
b. Function must have a finite number of maxima and minima and have a finite number of discontinuities within a period.
Options :
1.   Only a
2.   Only b
3.   Both a and b
4.   Neither a nor b


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Question Number : 46 Question Id : 441009935333 Question Type : MCQ
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Which of the following statements is/are true?

I. Impulse function is derivative of step function.
II. Ramp function of unit slope is integral of unit step function.
Options :
1.    Only I
2.    Only II
3.    Both I and II
4.    Neither I nor II

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Question Number : 48 Question Id : 441009754194 Question Type : MCQ
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Which of the following best describes load regulation in a single-phase transformer?
Options :
1.   Difference in voltage between standby and shutdown mode
2.   Difference between no-load and full-load voltage output
3.   Change in voltage due to input variation
4.   Regulation of current in a load resistor


Question Number : 49 Question Id : 441009754260 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Which of the following is not a condition required for synchronizing an alternator to the bus-bar?
Options :
1.   Equal terminal voltage
2.   Same frequency
3.   Equal power factor
4.   Identical phase sequence


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Question Number : 51 Question Id : 441009754160 Question Type : MCQ
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The component of no-load current responsible for core losses in the transformer is:
Options :
1.   Magnetizing component
2.   Leakage current
3.   Working or active component
4.   Entire no-load current


Question Number : 52 Question Id : 441009754242 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
What issue arises in a Y/Y transformer if the load is unbalanced?
Options :
1.   The secondary voltage becomes constant
2.   Neutral point shifts, causing unequal phase voltages
3.   Line current becomes zero
4.   Phase angle between voltages increases beyond 30°


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Question Number : 55 Question Id : 441009754276 Question Type : MCQ
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The torque developed in a synchronous motor is directly proportional to the _____.
Options :
1.   Speed of the motor
2.   Cosine of the load angle
3.   Armature current
4.   Sine of the load angle


Question Number : 56 Question Id : 441009935342 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
A three-phase alternator has 4 poles, 48 slots. Winding pitch is 10 slots. By what electrical angle is the winding chorded?
Options :
1.   20°
2.   30°
3.   40°
4.   10°


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Question Number : 58 Question Id : 441009935344 Question Type : MCQ
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The torque produced in a DC series motor is 100 N-m when the armature current is 50 A. What will be the torque produced if the armature current
is increased to 100 A?
Options :
1.   200 N-m
2.   100 N-m
3.   50 N-m
4.   400 N-m


Question Number : 59 Question Id : 441009935345 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Which of the following statements are true with reference to DC motors?

I. No load speed of DC shunt motor is fixed by the voltage applied across the armature.
II. A DC series motor should never be started on no load.

Options :
1.   Only I
2.   Only II
3.   Both I and II
4.   Neither I nor II

Question Number : 60 Question Id : 441009935346 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Read the Assertion (A) and Reason (R) given below and select the most appropriate option.

A - The three-phase Induction Motor is self-starting.
R - In a three-phase Induction Motor, the stator currents produce a rotating magnetic field.
Options :
1.   Both A and R are true, and R is the correct explanation of A.
2.   Both A and R are true, but R is not the correct explanation of A.
3.   A is true, but R is false.
4.   A is false, but R is true.


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Question Number : 64 Question Id : 441009754334 Question Type : MCQ
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The ‘most economical power factor’ is defined as the power factor at which:
Options :
1.    The system operates with minimum reactive power flow
2.    The apparent power drawn from the supply is minimum
3.    The difference between savings in demand charges and cost of correction is maximized
4.   The consumer pays only for real power consumed


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Question Number : 67 Question Id : 441009754290 Question Type : MCQ
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Which thermodynamic cycle is the basis of operation for a steam power station?
Options :
1.   Brayton cycle
2.   Otto cycle
3.   Diesel cycle
4.   Rankine cycle


Question Number : 68 Question Id : 441009754304 Question Type : MCQ
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Which of the following is a major technical advantage of HVDC transmission over HVAC transmission?
Options :
1.   Higher skin effect improves conductor usage
2.   Absence of inductance and capacitance reduces losses
3.   Lower voltage regulation
4.   Easy generation at higher voltages


Question Number : 69 Question Id : 441009935354 Question Type : MCQ
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The cost of the transmission line is ₹20/m at a transmission voltage of 440 kV. What will the cost (in ₹ per metre) if the transmission voltage is
decreased to 110 kV?
Options :
1.   80
2.   160
3.   320
4.   20

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Question Number : 71 Question Id : 441009754348 Question Type : MCQ
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Which of the following statements is true regarding symmetrical components?
Options :
1.    They are only applicable to balanced systems
2.    They require the system to have identical impedance in all three phases
3.    They are applicable to any three-vector system whose resultant is zero
4.   They can only be used in delta-connected systems


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Question Number : 75 Question Id : 441009935361 Question Type : MCQ
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Which of the statements is/are true with reference to stability of power system?

I. In a stable system, the torque angle undergoes oscillations which eventually dies out.
II. Stability limit is the maximum power flow possible in the system when system is operating with stability.
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2.


3.

4.   Neither I nor II

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Question Number : 80 Question Id : 441009801390 Question Type : MCQ
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In LTI systems, the standard form of state equations uses ____________ as system matrix and ___________ as output matrix.
Options :
1.   Matrix C, Matrix A
2.   Matrix D, Matrix B
3.   Matrix C, Matrix B
4.   Matrix A, Matrix C


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Question Number : 83 Question Id : 441009801316 Question Type : MCQ
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MATCH THE COLUMNS with reference to Mason Gain’s formula.
Parameter                                                              Relevance
I. Forward Path                                                        A. The value of determinant Δ excluding loops that touch the kth forward path
II. Loop                                                               B. A path that starts and ends at the same node, without retracing any branches
III. Δk                                                                C. A path that starts from the input node and ends at the output node without re
Options :
1.   I-C, II-A, III-B
2.   I-A, II-B, III-C
3.   I-C, II-B, III-A
4.   I-B, II-C, III-A

Question Number : 84 Question Id : 441009801365 Question Type : MCQ
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Determine the number of branches of Root Locus approaching infinity if the transfer function G(s).H(s) has 3 poles and 1 zero.
Options :
1.   3
2.   1
3.   2
4.   4


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Question Number : 88 Question Id : 441009801349 Question Type : MCQ
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Determine the number of encirclements (N) of the critical point (-1, 0) by the Nyquist plot if the number of closed-loop poles in the right-half s-
plane is 5 and there are 3 open-loop poles in the right-half s-plane.
Options :
1.   5
2.   3
3.   2
4.   8


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Question Number : 91 Question Id : 441009935378 Question Type : MCQ
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Which of the following statements is/are true?

I. A centroid is a point where the root loci break from the real axis.
II. A centroid is a point on the real axis where all asymptotes intersect.
Options :

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2.


3.

4.   Neither I nor II

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Question Number : 94 Question Id : 441009935366 Question Type : MCQ
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Match the following.

                                  List I                                                        List II
A. underdamped system                                          i) damping ratio is zero
B. overdamped system                                           ii) damping ratio is 0.5
C. undamped system                                             iii) damping ratio is one
D. critically damped system                                    iv) damping ratio is more than one
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3.   A -iii, B- i, C- iv, D- ii

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3.    A - iii, B - i, C - iv, D - ii

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Question Number : 97 Question Id : 441009801421 Question Type : MCQ
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Determine the overall voltage gain of the 3-stage cascaded system which has the 1st stage and last stage as buffers with CB configuration of gain 50
in between.
Options :
1.   16.67
2.   150
3.   50
4.   100


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Question Number : 101 Question Id : 441009801430 Question Type : MCQ
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What is the first and last stage of operational amplifier with reference to its block diagram.
Options :
1.   regulator, filter
2.   differential amplifier, power amplifier
3.   low pass filter, regulator
4.   differential amplifier, full wave rectifier


Question Number : 102 Question Id : 441009801436 Question Type : MCQ
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An S-R latch is a fundamental memory element in digital circuits, capable of storing a __________ bit of data and it's essentially a _________
multivibrator.
Options :
1.   1, astable
2.   2, monostable
3.   1, bistable
4.   1, monostable

Question Number : 103 Question Id : 441009935387 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66




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1.


2.


3.


4.



Question Number : 104 Question Id : 441009935389 Question Type : MCQ
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2.


3.


4.

Question Number : 105 Question Id : 441009935391 Question Type : MCQ
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1.


2.


3.


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Question Number : 106 Question Id : 441009801413 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
What is the drain current in a self-biased D-MOSFET circuit with a 20V supply and a total resistance of 5kΩ (Rd + Rs) when biased at the
midpoint?
Options :
1.   1 mA
2.   5 mA
3.   2 mA
4.   10 mA


Question Number : 107 Question Id : 441009801481 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Which signal determines the count direction in an up-down counter, and what range of states does a decade counter cycle through?
Options :
1.   Clock, 0 to 8
2.   Logic 1, 0 to 12
3.   Mode, 0 to 9
4.   Preset, 11 to 15


Question Number : 108 Question Id : 441009935392 Question Type : MCQ
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1.


2.


3.


4.

Question Number : 109 Question Id : 441009935393 Question Type : MCQ
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1.


2.


3.


4.



Question Number : 110 Question Id : 441009935394 Question Type : MCQ
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1.


2.


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Question Number : 111 Question Id : 441009935395 Question Type : MCQ
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1.


2.


3.


4.

Question Number : 112 Question Id : 441009935396 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66




Options :

1.


2.


3.

4.   Neither I nor II

Question Number : 113 Question Id : 441009935398 Question Type : MCQ
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1.


2.


3.


4.



Question Number : 114 Question Id : 441009935399 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
For the Assertion (A) and Reason (R) given below, choose the correct option.
A. A voltage follower is a special case of non-inverting amplifier where partial output voltage is fed to the inverting
input.
R. The most important features of the voltage follower configuration are high input impedance and low output
impedance.
Options :

1.


2.


3.


4.

Question Number : 115 Question Id : 441009935402 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66


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1.


2.


3.


4.



Question Number : 116 Question Id : 441009935403 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Dynamometer type wattmeter is used in a circuit for power measurement. Wattmeter indicates ______ power.
Options :
1.   apparent
2.   average
3.   peak
4.   instantaneous


Question Number : 117 Question Id : 441009935404 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Dissipation factor of a capacitor can be measured using which of the following ac bridges?
Options :

1.


2.


3.


4.



Question Number : 118 Question Id : 441009935405 Question Type : MCQ
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1.


2.


3.


4.

Question Number : 119 Question Id : 441009801509 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
In an electrodynamometer, the meter deflection is _______________________.
Options :
1.   Function of cube root of the current
2.   Function of mean of the squared current
3.   Function of cube of the current
4.   Function of square root of the current


Question Number : 120 Question Id : 441009801538 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Identify whether the given statements are correct.
Statement I: The spectral analyser analyses the frequency spectrum of a signal, identifying the frequencies present and their amplitudes.
Statement II: The network analyser is used to analyse the impedance and other parameters of devices at specific frequencies.
Options :
1.   Only statement I is correct
2.   Only statement II is correct
3.   Both statements I and II are correct
4.   Both statements I and II are incorrect


Question Number : 121 Question Id : 441009935406 Question Type : MCQ
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1.


2.


3.


4.



Question Number : 122 Question Id : 441009935408 Question Type : MCQ
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2.


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4.

Question Number : 123 Question Id : 441009935409 Question Type : MCQ
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2.


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Question Number : 124 Question Id : 441009801523 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Identify whether the given statements related to Maxwell’s Heavyside bridge are correct.
Statement I: The Heaviside bridge circuit is used to measure mutual inductance.
Statement II: The Maxwell’s Heaviside bridge circuit voltage will lead the circuit current in balanced bridge condition.
Options :
1.   Only statement I is correct
2.   Only statement II is correct
3.   Both statements I and II are correct
4.   Both statements I and II are incorrect


Question Number : 125 Question Id : 441009801531 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Curve fitting aims to find a function that represents the underlying relationship between data points and helps in:
a. Interpolation
b. Extrapolation
c. Prediction
Options :
1.   Only a
2.   Only b
3.   Only a and c
4.   a, b and c


Question Number : 126 Question Id : 441009935411 Question Type : MCQ
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1.


2.


3.


4.

Question Number : 127 Question Id : 441009935412 Question Type : MCQ
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2.


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4.



Question Number : 128 Question Id : 441009935413 Question Type : MCQ
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2.


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Question Number : 129 Question Id : 441009935414 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Which of the statements is/are true?

i. PMMC instrument can be used for reading both ac and dc signals.
Il. Deflecting torque in a PMMC meter is proportional to the current through the moving coil.
Options :

1.


2.


3.

4.   Neither I nor II

Question Number : 130 Question Id : 441009935415 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Which of the statements is/are true?

I. Resolution is the smallest measurable input change and threshold is the smallest measurable input.
II. Precision is the measure of reproducibility of measurements.
Options :

1.


2.


3.

4.   Neither I nor II


Question Number : 131 Question Id : 441009935416 Question Type : MCQ
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1.


2.


3.


4.



Question Number : 132 Question Id : 441009935401 Question Type : MCQ
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1.

2.

3.


4.

Question Number : 133 Question Id : 441009935419 Question Type : MCQ
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2.


3.


4.



Question Number : 134 Question Id : 441009935420 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Which of the following semiconductor devices can be triggered into conduction by a pulse of gating signal?
Options :
1.


2.


3.


4.



Question Number : 135 Question Id : 441009935421 Question Type : MCQ
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1.


2.


3.


4.

Question Number : 136 Question Id : 441009935422 Question Type : MCQ
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2.


3.


4.



Question Number : 137 Question Id : 441009801546 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
A Schottky diode has ___________ switching speed and ____________ turn-on voltage compared to normal PN junction diode.
Options :
1.   slower, higher
2.   slower, lower
3.   faster, higher
4.   faster, lower


Question Number : 138 Question Id : 441009801577 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
What is the correct condition for turning off the SCR in single-phase full wave converter having line commutation mode of operation?
Options :
1.   SCR turns off due to negative voltage applied to the gate terminal
2.   SCR turns off by natural reversal of ac supply voltage
3.   SCR turns off due to positive voltage applied to the gate terminal
4.   SCR turns off due to switching off the power supply


Question Number : 139 Question Id : 441009935424 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Which of the following statements is correct with reference to a two-quadrant ac to dc converter?
Options :

1.


2.


3.

4.   Polarity of voltage and current are always negative

Question Number : 140 Question Id : 441009935425 Question Type : MCQ
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2.



3.



4.



Question Number : 141 Question Id : 441009935426 Question Type : MCQ
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2.


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Question Number : 142 Question Id : 441009935427 Question Type : MCQ
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2.


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Question Number : 143 Question Id : 441009801593 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
In ideal dual convertors, the firing angle of both the converters is controlled such that ______________
Options :
1.   The average output voltage of converter 2 is greater than converter 1
2.   The average output voltage of the two converters are equal in magnitude
3.   The average output voltage of the two converters is independent and no matching or relation is required.
4.   The average output voltage of converter 1 is greater than converter 2

Question Number : 144 Question Id : 441009935429 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
A single-phase full bridge inverter is operated from a 50 V supply. The load is a purely resistive load of 10 Ω. What is the rms value of output
voltage, and the rms value of output voltage at the fundamental frequency?
Options :


1.




2.




3.




4.



Question Number : 145 Question Id : 441009935430 Question Type : MCQ
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1.


2.


3.


4.

Question Number : 146 Question Id : 441009935431 Question Type : MCQ
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2.




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Question Number : 147 Question Id : 441009935432 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Which of the statements is/are true?

I. Power electronic converters are the backbone of adjustable speed drives.
Il. Harmonics are inevitable in power electronic converters.
Options :

1.


2.


3.

4.   Neither I nor II


Question Number : 148 Question Id : 441009935433 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Which of the statements is/are true referred to DC-DC converters?

I. Frequency modulation control strategy is more advantageous than pulse width modulation control
II. Large OFF time in frequency modulation may make the load current discontinuous.
Options :

1.


2.


3.

4.   Neither I nor II

Question Number : 149 Question Id : 441009935435 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
For the Assertion (A) and Reason (R) given below, choose the correct alternative.

A. IGBT combines best features of power MOSFET and bipolar transistor.
R. Its input characteristics are similar to those of bipolar transistor and output characteristics similar to those of MOSFET.
Options :

1.


2.


3.


4.



Question Number : 150 Question Id : 441009935418 Question Type : MCQ
Correct Marks : 2 Wrong Marks : 0.66
Match the items in List 1 with the items in List 2.

List 1                                                                      List 2
A. Triac                                                                    i. Bidirectional
B. Diode                                                                    ii. Turn off by negative pulse
C. MOSFET                                                                   iii. Uncontrolled turn on and turn off
D. GTO                                                                      iv. High switching speed

Options :
1.    A - i, B - ii, C - iii, D - iv
2.
A - ii, B - iv, C - i, D - iii
3.
A - iii, B - i, C - iv, D - ii
4.
A - i, B - iii, C - iv, D - ii