The peak for both half cycles of the output waveform—
16 V, 4 V
16 V, –4 V
–16 V, 4 V
12 V, 4 V
Correct Option: A
For first half cycle the diode will be OFF So, V0 = Vi = 16 V For second half cycle the diode will be ON So, V0 = VB = 4V Hence alternative (A) is the correct choice.