P-a, Q- c, R-d, S-b
P-c, Q- a, R-d, S-b
P-d, Q- b, R-a, S-c
P-c, Q- d, R-b, S-a
The correct option is C P-c, Q- a, R-d, S-b
Path (I)→constant volume→isochoric
Path (II)→PVr=k→adiabatic
Path (III)→constant temperature→Isothermal
Path (IV)→constant pressure→isobaric