Match the human diseases in $Group\; I$ with the causative agents in $Group\; II$.

$$\begin{array}&&\textbf{Group I} & \textbf{Group II} \\ &\text{P. Amoebiasis} & \text{1. Leishmania donovani}\\ &\text{Q. African sleeping sickness} & \text{2. Trypanosoma cruzi} \\ &\text{R. Kala azar} & \text{3. Entamoeba histolytica} \\ &\text{S. Chagas’ disease} & \text{4. Trypanosoma gambiense} \\ \end{array}$$

1. $P-3, Q-4, R-2, S-1$
2. $P-3, Q-2, R-1, S-4$
3. $P-3, Q-4, R-1, S-2$
4. $P-4, Q-3, R-1,S-2$