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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. $I-S,\:II-R,\:III-P,\:IV-Q$
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