Which one of the following reactions indicates the reducing ability of hydrogen peroxide in basic medium?

$\displaystyle \mathrm{HOCl}+\mathrm{H}_2 \mathrm{O}_2 \rightarrow \mathrm{H}_3 \mathrm{O}^{+}+\mathrm{Cl}^{-}+\mathrm{O}_2$

$\displaystyle \mathrm{PbS}+4 \mathrm{H}_2 \mathrm{O}_2 \rightarrow \mathrm{PbSO}_4+4 \mathrm{H}_2 \mathrm{O}$

$\displaystyle 2 \mathrm{MnO}_4^{-}+3 \mathrm{H}_2 \mathrm{O}_2 \rightarrow 2 \mathrm{MnO}_2+3 \mathrm{O}_2+2 \mathrm{H}_2 \mathrm{O}+2 \mathrm{OH}^{-}$

$\displaystyle \mathrm{Mn}^{2+}+\mathrm{H}_2 \mathrm{O}_2 \rightarrow \mathrm{Mn}^{4+}+2 \mathrm{OH}^{-}$