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In which of the following reactions, $\mathrm{O}_2$ is not liberated?

ChemistryHydrogenAP EAMCETAP EAMCET 2017 (24 Apr Shift 2)

Options:

A $\mathrm{MnO}_4^{-}+\mathrm{H}_2 \mathrm{O}_2+\mathrm{H}^{+} \longrightarrow$
B $\mathrm{H}_2 \mathrm{O}_2+\mathrm{I}_2+\mathrm{OH}^{-} \longrightarrow$
C $\mathrm{HOCl}+\mathrm{H}_2 \mathrm{O}_2 \longrightarrow$
D $\mathrm{Fe}^{2+}(\mathrm{aq})+\mathrm{H}^{+}(\mathrm{aq})+\mathrm{H}_2 \mathrm{O}_2 \longrightarrow$