Thermodynamic processes are indicated in the following diagram.
P→C,Q→A,R→D,S→B
P→C,Q→D,R→B,S→A
P→D,Q→B,R→A, S→C
P→A,Q→C,R→D,S→B
In process I, volume is constant
∴ Process I→ Isochoric; P→C
As slope of curve II is more than the slope of curve III. Process II → Adiabatic and Process III→ Isothermal
∴Q→A,R→D
In process IV, pressure is constant
Process IV → Isobaric; S→B