Answer:
The answer to your question is letter A
Explanation:
Data
Reactants Mg(OH)₂ and H₃PO₄
This is a neutralization reaction because the reactants are a base (Mg(OH)₂) and an acid (H₃PO₄).
The products in a neutralization reaction are always water and a salt.
Balanced chemical reaction
3Mg(OH)₂ + 2H₃PO₄ ⇒ Mg₃(PO₄)₂ + 6H₂O