The anode half-reaction occurring during the discharge of a lead storage battery is
- A$Pb(s)+SO_4{ }^{2-}(aq) \rightarrow PbSO_4(s)+2 e^{-}$
- B$PbO_2(s)+4 H^{+}(aq)+SO_4{ }^{2-}(aq)+2 e^{-} \rightarrow PbSO_4(s)+2 H_2 O(l)$
- C$Pb^{2+}(aq)+SO_4{ }^{2-}(aq) \rightarrow PbSO_4(s)$
- D$Pb(s)+SO_2+O_2 \rightarrow PbSO_4(s)$
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