The correct option is D H2O2+2OH−⟶−2e−O2+2H2O
Losing or giving away electrons reduces the oxidation number/state of the species with which H2O2 reacts. Hence, in those cases, H2O2 will be acting as a reducing agent.
In reactions:
H2O2⟶−2e−O2+2H+
H2O2+2OH−⟶−2e−O2+2H2O
It is clear that H2O2 is losing electrons. Hence H2O2 acts as reducing agent in the above reactions.