The correct code for stability, of oxidation states for given cations is :<br>(i) Pb2+ > Pb4+, Tl+ < Tl3+<br>(ii) Bi3+ < Sb3+, Sn2+ < Sn4+<br>(iii) Pb2+ > Pb4+, | p Block Elements β€” Chem-Mantra | Chem-Mantra