One mole of an ideal gas at pressure Po and temperature To is expanded isothermally to twice its volume and then compressed at constant pressure to (Vo/2) and the gas is brought back to original state by a process in which P \(\propto\) V (pressure is directly proportional to volume). The correct temperature of the process is : 

Process AB is isothermal expansion, BC is isobaric compression and in process CA : 

\(P \propto \frac{nRT}{P}\)

\(P^2 \propto T\)