Match the items of Column I and Column II.

Explanation

A. Chemical reaction occuring on lead storage battery can be represented as
At anode `Pb(s)+SO_(4)^(2-)(aq)rarrPbSO_(4)(s)+2e^(-)`
At cathode `PbO_(2)(s)+So_(4)^(2-)(aq)+4H^(+)(aq)overset(+2e^(-))rarr2PbSO_(4)(s)+2H_(2)O(l)`
Thus, Pb is anode and `PbO_(2)` is cathode.
B. Mercuty cell does not include ions during their function hence produce steady current.
C. Fuel cell has maximum efficiency as they produces energy due to combustion reaction of fuel.
D. Rusting is prevented by corrosion.