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In a PNP transistor operating in active region, the main stream of current is_________

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In a PNP transistor operating in active region, the main stream of current is_________

(a) drift of holes

(b) drift of electrons

(c) diffusion of holes

(d) diffusion of electrons

I had been asked this question in a national level competition.

Asked question is from The Transistor as an Amplifier topic in section Transistor Characteristics of Electronic Devices & Circuits

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The correct answer is (c) diffusion of holes

Easiest explanation: The emitter-base junction is forward biased while collector-base junction is reversed biased. The transistor now operates in active region. Here, it can be used for amplification purpose.

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