Discussion
| List - I | List - II |
|---|---|
| a. AC | i. Contains the data of stored from registers |
| b. SP | ii. used for storing address of the external memory |
| c. HL | iii. Contains the address of the instructions which has to be executed after completion of execution of present instruction. |
| d. PC | iv. Primary register to perform arithmetic and logical operations |
Answer: C
The correct matching is a-iv, b-i, c-ii, d-iii. In the 8085 the accumulator (AC) is the primary register for arithmetic and logical operations. The program counter (PC) holds the address of the next instruction to be executed, after the present one is complete. The HL pair holds a memory address and is used to address external memory. The stack pointer (SP) takes the one description left, as the key has it.
The other options give the accumulator the role of the PC or HL, which is wrong, because the accumulator is the arithmetic register.
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