Which one of the following is the correct match between the molecular properties listed in Column I and the corresponding biochemical separation methods in Column II?
\[
\begin{array}{|c|c|}
\hline
\textbf{Column I} & \textbf{Column II} \\ \hline
P. \, \text{Solubility} & iii. \, \text{Salting out} \\ \hline
Q. \, \text{Ionic charge} & iv. \, \text{Isoelectric focusing} \\ \hline
R. \, \text{Polarity} & i. \, \text{Reverse phase chromatography} \\ \hline
S. \, \text{Molecular size} & v. \, \text{Gel electrophoresis} \\ \hline
\end{array}
\]