The molar specific heats of an ideal gas at constant pressure and volume are denoted by $$C_{P}$$ and $$C_{V}$$, respectively. 

If $$\gamma = \frac{C_{p}}{C_{v}}$$ and R is the universal gas constant , then $$C_{v}$$ is equal to:

A

$$\gamma$$ R

B

$$\frac{1+\gamma}{1-\gamma}$$

C

$$\frac{R}{\gamma-1}$$

D

$$\frac{\gamma-1}{R}$$