Match the Product with the most appropriate Processing Technique employed.
$$\begin{array}{|l|l|l|l|} \hline & \textbf{Product} & & \textbf{Processing Technique} \\ \hline P & \text{Rainboots} & 1 & \text{Blow molding} \\ \hline Q & \text{Disposable plastic cups} & 2 & \text{Calendering} \\ \hline R & \text{Soft drink bottles} & 3 & \text{Rotational molding} \\
\hline S & \text{Flexible films} & 4 & \text{Thermoforming} \\ \hline \end{array}$$
- $\mathrm{P}-3 ; \mathrm{Q}-1 ; \mathrm{R}-2 ; \mathrm{S}-4$
- $\mathrm{P}-3 ; \mathrm{Q}-4 ; \mathrm{R}-1 ; \mathrm{S}-2$
- $\mathrm{P}-1 ; \mathrm{Q}-2 ; \mathrm{R}-4 ; \mathrm{S}-3$
- $\mathrm{P}-1 ; \mathrm{Q}-3 ; \mathrm{R}-4 ; \mathrm{S}-2$
