An ideal gas undergoes a quasi static, reversible process in which its molar heat capacity C remains constant. If during this process the relation of pressure p and volume V is given by pVn=constant, then n is given by (Here, Cp and Cv are molar specific heat at constant pressure and constant volume, respectively)
(a) n=CvCp
(b) n=C−CvC−Cp
(c) n=C−CvCp−C
(d) n=C−CpC−Cv