Match separation methods in $\text{Group I}$ with associated properties in $\text{Group II}$.
$$\begin{array}{|l|l|l|l|} \hline & \textbf{Group I} && \textbf{Group II} \\ \hline P. & \text{Centrifugation} & 1. & \text{Density} \\ \hline Q. & \text{Dialysis} & 2. & \text{Diffusivity} \\ \hline R. & \text{Solvent extraction} & 3. & \text{Size} \\ \hline S. & \text{Ultrafilration} & 4. & \text{Solubility} \\ \hline \end{array}$$
- $P-4, Q-2, R-1, S-3$
- $P-3, Q-1, R-2, S-4$
- $P-1, Q-3, R-2, S-4$
- $P-1, Q-2, R-4, S-3$