Match the chemicals written on the left with the raw materials required to produce them mentioned on the right.

$\begin{array}{cc}\ &\text{I. Single Superphosephate$(SSP)$} & \text{P. Rock phosphate + Sulfuric Acid + Ammonia} \\ &\text{II. Triple Superphosphate$(TSP)$} & \text{Q. Brine} \\ &\text{ III. Diammonium Phosphate$(DAP)$} & \text{R. Rock phosphate + Sulfuric Acid} \\ &\text{IV. Caustic soda} & \text{S. Rock phosphate + Phosphoric Acid } \\ \\ \end{array}$

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

Answer: