Select the pair of products formed in the electrolysis of a solution of ZrCl4(aq) using inert electrodes. Assume that there are no overpotentials involved in any reactions.

a) Zr(s) + 2Cl₂(g)
b) Zr(s) + Cl₂(g)
c) Zr(s) + 4Cl₂(g)
d) ZrCl₂(s) + Cl₂(g)