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Match the half reactions in Column I with change in oxidation state in Column II. Select the correct match. Column I

Column II
(P) \( \mathrm{Cl}^{-} \rightarrow \mathrm{ClO}_{4}^{-} \)
(1) 2
(Q) \( \mathrm{Cr}^{3+} \rightarrow \mathrm{CrO}_{5} \)
(2) 8
(R) \( \mathrm{H}_{2} \mathrm{O}_{2} \rightarrow \mathrm{O}_{2} \)
(3) 0
(S) \( \mathrm{CrO}_{2}{ }^{2+} \rightarrow \mathrm{CrO}_{4}{ }^{2-} \)
(4) 3
(A) \( \begin{array}{llll}\mathrm{P} & \mathrm{Q} & \mathrm{R} & \mathrm{S} \\ 1 & 4 & 2 & 3\end{array} \)
(B) \( \begin{array}{llll}P & Q & R & S\end{array} \)
\( \begin{array}{llll}2 & 4 & 1 & 3\end{array} \)
(C) \( \begin{array}{llll}P & Q & R & S\end{array} \)
\( \begin{array}{llll}1 & 2 & 3 & 4\end{array} \)
(D) \( \begin{array}{llll}P & Q & R & S\end{array} \)
\( \begin{array}{llll}3 & 4 & 2 & 1\end{array} \)
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