2. The products formed when aluminium and magnesium are burnt in the presence of air respectively are:
(A) Al₃O₄ and MgO₂
(B) Al₂O₃ and MgO
(C) Al₃O₄ and MgO
(D) Al₂O₃ and MgO₂

Answer: (B) Al₂O₃ and MgO