# Transistor working as an amplifier operates in its active region of characteristic only when

a) The emitter junction is forward biased and collector junction is reversed biased.

b) emitter junction is reversed biased

c) collector junction is forward biased.

d) The emitter junction is reverse biased and collector junction is forward biased.

For transistor to work as an amplifier, the emitter junction is forward biased , collector junction is reverse biased.
Hence a is the correct answer.