Match List I with List II:
List I (Ion) — A. Co²⁺, B. Mg²⁺, C. Pb²⁺, D. Al³⁺
List II (Group Number in Cation Analysis) — I. Group-I, II. Group-III, III. Group-IV, IV. Group-VI
Choose the correct answer from the options given below:
Co²⁺ → Group IV (III); Mg²⁺ → Group VI (IV); Pb²⁺ → Group I (I); Al³⁺ → Group III (II). So A-III, B-IV, C-I, D-II.