While charging the lead storage battery, PbSO4 anode is reduced to Pb. PbSO4 cathode is oxidized to PbO2. PbSO4 anode is oxidized to PbO2.

A) (a) PbSO4 anode is reduced to Pb
B) (b) PbSO4 cathode is reduced to Pb
C) (c) PbSO4 cathode is oxidized to PbO2
D) (d) PbSO4 anode is oxidized to PbO2