What is the CORRECT match between the air pollutants and treatment techniques given in the table?
\begin{array}{|l|l|}
\hline \text{Air pollutants} & \text{Treatment techniques} \\
\hline \mathrm{P}-\mathrm{NO}_{2} & \text{i - Flaring} \\
\mathrm{Q}-\mathrm{SO}_{2} & \text{ii - Cyclonic separator} \\
\mathrm{R}-\mathrm{CO} & \text{iii - Lime scrubbing} \\
\mathrm{S}- \text{Particles} & \text{iv} -\mathrm{NH}_{3} \text{injection} \\
\hline
\end{array}
- $\text{P-i, Q-ii, R-iii, S-iv}$
- $\text{P-ii, Q-i, R-iv, S-iii}$
- $\text{P-ii, Q-iii, R-iv, S-i}$
- $\text{P-iv, Q-iii, R-i, S-ii}$