Match the various types of impurities present in water in Group I with the appropriate water treatment process given in Group II.
\[\begin{array}{|c|c|} \hline \textbf{Group I} & \textbf{Group II} \\ \hline \text{P: Fine suspended matter} & \text{1: Aeration} \\ \hline \text{Q: Pathogenic bacteria} & \text{2: Plain sedimentation} \\ \hline \text{R: Color, odour and taste} & \text{3: Sedimentation with coagulation} \\ \hline \text{S: Floating matter as leaves} & \text{4: Screening} \\ \hline & \text{5: Disinfection} \\ \hline \end{array}\]