One mole of an ideal gas goes from an initial state A to final state B via two processs : It first undergoes isothermal expansion from volume `V` to `3 V` and then its volume is reduced from `3 V` to `V` at constant pressure. The correct `P-V` diagram representing the two process in (figure)

Options

A.
B.
C.
D.

Answer

D

Explanation

1st process is isothermal expansion (T = constant) and 2nd process is isobaric process (compression).