In the figures shown below :

Question

(1) In both Fig. (a) and Fig. (b) the diodes are forward biased

(2) In both Fig. (a) and Fig. (b) the diodes are reversed biased

(3) In Fig. (a) the diode is forward biased and in Fig. (b), the diode is reverse biased.

(4) In Fig. (a) the diode is reverse biased and in Fig. (b), the diode is forward biased.