Identify the spectator ions in the precipitation reaction between aqueous solutions of magnesium chloride and potassium phosphate.

• A. PO₄³⁻, Cl⁻
• B. K⁺, Cl⁻
• C. Mg²⁺, PO₄³⁻
• D. K⁺, PO₄³⁻
• E. Mg²⁺, Cl⁻

Answer: (B)