# For one mole of an ideal gas $(\large\frac{\delta P}{\delta T})_V.(\large\frac{\delta V}{\delta T})_P . (\large\frac{\delta V}{\delta T})_T$ is equal to ....
$(a)\;\large\frac{-R^2}{P^2}\qquad(b)\;\large\frac{R^2}{P^2}\qquad(c)\;+1\qquad(d)\;-1$