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In which of the following reactions $\;H_{2}O_{2}\;$ acts as a reducing agent ?\[\] (1) $H_{2}O_{2}+2H^{+}+2e^{-} \to 2H_{2}O$\[\] (2) $H_{2}O_{2}-2e^{-} \to O_{2} + 2H^{+}$\[\] (3) $H_{2}O_{2}+2e^{-} \to 2OH^{-}$\[\] (4) $H_{2}O_{2}+2OH^{-}-2e^{-} \to O_{2} + 2H^{2}O$

$(a)\;(1) ,(2)\qquad(b)\;(3) , (4)\qquad(c)\;(1) , (3)\qquad(d)\;(2) , (4)$

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