In the circuit diagram D1, D2, D3 and D4 are diodes. Choose the correct answer from the options given below

D1 and D2 are forward biased D1 and D3 are forward biased D2 and D4 are forward biased All diodes are forward biased

D1 and D3 are forward biased

From the above circuit it is clear that VA > VB        ∴ D1 is forward biased VA > VC         ∴ D2 is reverse biased VC > VD       ∴ D3 is forward biased VB > VD        ∴ D4 is reverse biased