Match the product in Group-$1$ with the manufacturing process in Group-$2$. The correct combination is

$$\begin{array}{|c|c|} \hline \text{} & \text{Group – 1} & & \text{Group – 2} \\ \hline \text{P} & \text{Nitric acid} & \text{I} & \text{Trona process} \\ \hline \text{Q} & \text{Phosphoric acid} & \text{II} & \text{Twitchell process} \\ \hline \text{R} & \text{Potassium chloride} & \text{III} & \text{Ostwald’s process} \\ \hline \text{S} & \text{Stearic acid} & \text{IV} & \text{Haifa process} \\ \hline \end{array}$$

1. $\text{P-III, Q-I, R-IV, S-II}$
2. $\text{P-IV, Q-I, R-II, S-III}$
3. $\text{P-III, Q-IV, R-I, S-II}$
4. $\text{P-I, Q-IV, R-II, S-III}$