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 $PV^n =$ constant, then n is given by (Here $C_p$ and $C_v$ are molar specific heat at constant pressure and constant volume, respectively) :
JEE MAIN 2016, Diffcult
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