The correct option is B comproportionation
The reaction occurring in lead storage battery is a kind of comproportionation.
The other name of comproportionation is symproportionation.
It is a chemical reaction in which two reactants, containing the same element in different oxidation state, will form a product in which the elements reach the same oxidation state.
Reaction occurring in lead storage battery is as shown.
Pb(s)+PbO2(s)+2H2SO4(aq)→2PbSO4(s)+2H2O(l)