ANS:A - equivalent weight.

The correct relationship is that the amount of different substances produced when the same quantity of electricity is passed through different solutions is proportional to their equivalent weight. Equivalent weight is a measure of the mass of a substance that can donate or accept one mole of electrons during a redox reaction. It is often expressed in grams per equivalent (g/eq) and is determined based on the stoichiometry of the reaction and the number of electrons transferred. During electrolysis, the amount of substance produced at an electrode is directly proportional to the number of moles of electrons transferred, which in turn is proportional to the equivalent weight of the substance being electrolyzed. Therefore, the greater the equivalent weight of a substance, the more mass of that substance will be deposited or liberated during electrolysis when the same quantity of electricity is passed through different solutions.