A cyclic process A B C D is shown below in the given P-V diagram. In the following answers the one that represents the same process as in P-V diagram :

Step-by-step solution

In P - V diagrams process A B is isobaric process in which pressure remains constant i.e, P= constant at all temperatures. Process B C is isothermal process in which, temperature remains constant i.e., T= constant. Process C D is isochoric process in which volume remains constant i.e., P-T diagram C D is a straight line passing through origin. Process A D is adiabatic process which corresponds to process A D in P - T diagram Hence, the correct P-T diagram is shown in option (a).