300 ml of a gaseous hydrocarbon when burnt in excess of O₂ gave 2.4 lit. of CO₂ and 2.7 lit. of water vapour under same condition. The molecular formula of hydrocarbon is :–
(1) C₄H₈
(2) C₆H₁₈
(3) C₆H₁₄
(4) C₈H₁₆