If $v,\:u,\:s$ and $g$ represent respectively the molar volume, molar internal energy, molar entropy and molar Gibbs free energy, then match the entries in the left and right columns below and choose the correct option.

$\begin{array}{cc}\

&\text{P. $-\left ( \partial u/\partial v \right )_{s}$} & \text{I. Temperature} \\

&\text{Q. $\left ( \partial g/\partial P \right )_{T}$} & \text{ II. Pressure} \\

&\text{R. $-\left ( \partial g/\partial T \right )_{P}$} & \text{III. $v$} \\

&\text{S. $\left ( \partial u/\partial s \right )_{v}$} & \text{IV. $s$} \\

\\ \end{array}$