An ideal gas under goes 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 `PV^n=constant`, then n is given by (Here `C_P and C_V` are molar specific heat at constant pressure and constant volume, respectively):
A. `n=(C-C_(p))/(C-C_(v))`
B. `n=(C_(p)-C)/(C-C_(v))`
C. `n=(C-C_(v))/(C-C_(p))`
D. `n=(C_(p))/(C_(v))`
