The ratio of work done by an ideal monoatomic gas to the heat supplied to it in an isobaric process is :

Question

$\begin{array}{1 1}(1) \large\frac{3}{2} \\ (2) \large\frac{2}{3} \\ (3) \large\frac{3}{5} \\ (4) \large\frac{2}{5} \end{array} $