Which of the following combinations represent correctly matched ions and their corresponding compounds? (Select two correct answers.)
a) Pb²⁺ and CO₃²⁻
b) Pb²⁺ and I⁻
c) Fe³⁺ and Cl⁻
d) Cu²⁺ and SO₄²⁻
e) Al³⁺ and Cl⁻