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Match the terms given in Column I with the compounds given in Column II.
\begin{tabular}{|l|l|l|l|}
\hline & Column I & & Column II \\
\hline (A) & Acid rain & (P) & \( \mathrm{CHCl}_{2}-\mathrm{CHF}_{2} \) \\
\hline (B) & Photochemical smog & (Q) & \( \mathrm{CO} \) \\
\hline (C) & \begin{tabular}{l}
Combination with \\
haemoglobin
\end{tabular} & (R) & \( \mathrm{CO}_{2} \) \\
\hline (D) & \begin{tabular}{l}
Depletion of ozone \\
layer hydrocarbons
\end{tabular} & (S) & \( \mathrm{SO}_{2} \) \\
\hline & (T) & \begin{tabular}{l}
Unsaturated \\
hydrocarbons
\end{tabular} \\
\hline
\end{tabular}
\begin{tabular}{lllll}
& A & B & C & D \\
(1) & P, S & Q & R & Q, S \\
(2) & Q & R & S & P \\
(3) & R, S & T, S & P & Q \\
(4) & R, S & T, S & Q & P
\end{tabular}


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