Standard oxidation potentials $(SOP)$ of four metals $P, Q, R$ and $S$ are $+2.87 \ V, +3.05 \ V, -0.80 \ V$ and $+0.25 \ V$ respectively. The reducing power of these metals is:
- A$Q > P > S > R$
- B$S > R > Q > P$
- C$P > Q > S > R$
- D$P > R > Q > S$
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