$'n’$ moles of an ideal gas undergoes a process $A \to B$ as shown in the figure. The maximum temperature of the gas during the process will be : <br>

Question

( A ) $\frac{9 \;P_0V_0}{4nR}$
( B ) $\frac{9 \;P_0V_0}{2nR}$
( C ) $\frac{9 \;P_0V_0}{nR}$
( D ) $\frac{3 \;P_0V_0}{2nR}$