Discussion
In a MOSFET devices, the N-channel type is better than the P-channel type in the following respect :
Answer: B
The N-channel MOSFET is better because it is faster.
In an N-channel device the current is carried by electrons, whose mobility in silicon (about 1350 cm2/V s) is roughly two to three times the hole mobility (about 480 cm2/V s) that governs a P-channel device. For the same size, an NMOS transistor therefore has higher transconductance and lower on-resistance, so it charges load capacitance faster and switches faster.
Noise immunity is a property of the logic family's voltage levels, not of the channel type. TTL compatibility and drive capability depend on the circuit design and supply voltages, so they are not the defining advantage of N-channel over P-channel devices.
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