In which of the following reactions, H₂O₂ acts as a reducing reagent ?

Easy

A

$\large Pb{S_{(s)}}\; + \;4{H_2}{O_{2(aq)}}\;\xrightarrow{{\;\;\;{H^ - }\;\;\;}}PbS{O_{4(s)}}\; + \;4{H_2}{O_{(l)}}\;$
B

$HOCl\; + {H_2}{O_2}\;\xrightarrow{{\;\;\;{H^ - }\;\;\;}}{H_3}{O^ + }\; + C{l^ - } + {O_2}$
C

$M{n^{2 + }}\; + {H_2}{O_2}\;\xrightarrow{{\;\;\;O{H^ - }\;\;\;}}M{n^{4 + }} + 2O{H^ - }$
D

$2F{e^{2 + }}\; + {H_2}{O_2}\;\xrightarrow{{\;\;\;O{H^ - }\;\;\;}}2F{e^{3 + }} + 2O{H^ - }$