Excess phosphorus was burnt in a gas jar and the residual gas passed successively over concentrated KOH solution and concentration H₂SO₄ before being collected in a flask. The gases collected are?

• A.carbon (IV) oxide, nitrogen and the rare gases
• B.nitrogen and the rare gases
• C.carbon (IV) oxide, nitrogen (IV) oxide and the rare gases
• D.carbon (IV) oxide
• E.