The molar specific heat of an ideal gas at constant pressure and constant volume is $C_{p}$ and $C_{V}$ respectively. If $R$ is the universal gas constant and the ratio of $C_{p}$ to $C_{V}$ is $\gamma$,then $C_{p}$ is equal to:

• A
  $\left(\frac{\gamma-1}{\gamma+1}\right) R$
• B
  $\frac{(\gamma-1) R}{\gamma}$
• C
  $\frac{R \gamma}{(\gamma-1)}$
• D
  $\frac{R \gamma}{(\gamma+1)}$