(i) PbSO₄ anode is reduced to Pb

(ii) PbSO₄ cathode is reduced to Pb

(iii) PbSO₄ cathode is oxidised to Pb

(iv) PbSO₄ anode is oxidised to PbO₂

Correct Answer: (i) PbSO₄ anode is reduced to Pb

Explanation:  While charging the battery storage lead the cell-based reaction which is reversed and the PbSO₄ (s) at the anode and cathode are converted to Pb and PbO₂ respectively.