Match the entries of column I with appropriate entries of column II and choose the correct option out of the four options given.

(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

(a) Dry cell: Dry cell is also known as Leclanche cell. Zinc metal acts as anode and inert graphite rod is surrounded by a paste of MnO2 and carbon black as cathode.

(b) Ni-Cd cell: Cd metal act as anode and nickel (III) compounds like NiO(OH) are supported on nickel acts as cathode.

(c) Fuel cell: The fuel (gaseous H₂) and oxidising agent (gaseous O₂) flow into separate cell compartments. Electrodes are made up of porous carbon impregnated with metallic catalyst.

(d) Lead storage battery: The anode, a series of lead grids packed with spongy lead and cathode, a series of grids packed with leaddioxide 38% by wt. of H₂SO₄ acts as an electrolyte.