The correct statement about charging of the lead storage battery is:

1. PbSO4 anode is reduced to Pb.
2. PbSO4 cathode is reduced to Pb.
3. PbSO4 cathode is oxidised to Pb.
4. PbSO4 anode is oxidised to PbO2.

HINT: 2PbSO4s+2H2OPbs+PbO2 s+4H+aq.+2SO42-aq. [ Charging reaction]
Explanation:
While charging the lead storage battery the reaction occurring on the cell is reversed and PbSO4 (s) on the anode and cathode
is converted into Pb and PbO2 respectively.
The electrode reactions are as follows: 
At anode PbSO4s+2e-Pbs+SO42-aq (Reduction)
At cathode PbSO4 s+2H2OPbO2 s+SO42-+4H++2e-(Oxidation)

Overall reaction 2PbSO4s+2H2OPbs+PbO2 s+4H+aq.+2SO42-aq.


Hence, option first is the correct option.