Correct Answer - A
(a) Fuel cell is a device that converts energy of combustion of fuels like hydrogen and methane, directly into electrical energy.
Electrolytic cell converts electrical energy into chemical energy
Dynamo is an electrical generator that produces direct current with the use of a commutator.
Ni-Cd cell is a type of rechargeable battery which consist of a cadmium anode and a metal grid containing `NiO_(2)` acting as a cathode .
