For a transistor to be operated as an amplifier, the biasing conditions of transistors will be:
1
base-emitter junction is forward biased and base-collector junction is reverse biased
2
base-emitter junction is reverse biased and base-collector junction is forward biased
3
base-emitter junction is forward biased and base-collector junction is also forward biased
4
base-emitter junction is reverse biased and base-collector junction is also reverse biased