The ratio of specific heats of gas and number of degrees of freedom (f) has the relation

• A

  $\mathrm{f}=\left(\gamma -1\right)$

• B

  $\mathrm{f}=\frac{2}{\gamma }-1$

• C

  $\mathrm{f}=\frac{2}{\left(\gamma -1\right)}$

• D

  $\mathrm{f}=2-\frac{1}{\gamma }$