In given diagram which p-n junction in reverse biased

If a p-n junction is reverse biased then

When a p-n junction is reverse biased then

When a p-n junction diode is reverse biased

A p-n junction diode is reverse biased. Then

A p-n junction diode is reverse biased. Then

Explain how the width of depletion layer in p-n junction diode changes when the junction is reverse biased.