PVy = constant, holds good for an isentropic process, which is (A) Reversible and isothermal
(B) Isothermal and irreversible
(C) Reversible and adiabatic
(D) Adiabatic and irreversible
(B) Isothermal and irreversible
(C) Reversible and adiabatic
(D) Adiabatic and irreversible