The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Anode is impure lead and cathode is pure lead.
The electrolyte is a mixture of PbSiF6,H2SiF6 and gelatin.
Pure metal from anode dissolves and is deposited on the cathode.
Discharge potential of Pb2+ is less than H+.
Hence, hydrogen is not liberated at cathode.
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.