One way in which the operation of a n-p-n transistor differs

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One way in which the operation of a n-p-n transistor differs from that of a p-n-p

1. the emitter junction is reversed biased in n-p-n
2. the emitter junction injects minority carriers into the base region of the p-n-p
3. the emitter injects holes into the base of the p-n-p and electrons into the base region of n-p-n
4. the emitter injects holes into the base of n-p-n

Correct Option: C

In p-n-p transistor holes are injected into the base while electrons are injected into the base of n-p-n transistor. Emitter-base junction is forward biased.