Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Statement I: Change in internal energy of a…

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason RStatement I: Change in internal energy of a system containing $\displaystyle n$ mole of ideal gas can be written as $\displaystyle \Delta \mathrm{U}=n \mathrm{C}_v\left(T_{\mathrm{f}}-T_i\right)=\frac{n R}{\gamma-1}\left(T_{\mathrm{f}}-T_i\right)$, where $\displaystyle \gamma=\frac{C_p}{C_v}, T_i=$ initial temperature, $\displaystyle T_{\mathrm{f}}=$ final temperature.Statement II: Relation between degree of freedom $\displaystyle f$ and $\displaystyle \gamma\left(=C_p / C_v\right)$ is $\displaystyle \left(\gamma=1+\frac{2}{f}\right)$ Choose the correct answer from the options given below