In which of the following reaction does `SO_(2)` acts as oxidising agent?

In which of the following reaction does `SO_(2)` acts as oxidising agent?
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In which of the following reaction does `SO_(2)` acts as oxidising agent? A. acidified `KMnO_(4)` B. acidified ... `C_(2)H_(5)OH` D. `H_(2)S`
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