Which one of the following reactions demonstrates that H2O2 acts as an oxidising agent in the basic medium:
(A) Mn2+ + H2O2 + 2OH– → MnO2 + 2H2O
(B) 2[Fe(CN)6 ]3– + H2O2 + 2OH– → 2[Fe(CN)6 ]4– + 2H2O + O2
(C) Na2CO3 + H2O2 → Na2O2 + H2O + CO2
(D) MnO2 + H2O2 + 2H+ → Mn2+ + 2H2O + O2