Two moles of a diatomic ideal gas is taken through the process $PT$ = const. Its temperature is increased from $T_oK$ to $2T_oK$. Find the work done by the system.

Question

$\begin {array} {1 1} (A)\;RT_o & \quad (B)\;4RT_o \\ (C)\;2RT_o & \quad (D)\;3RT_o \end {array}$