Match Column-I with Column-II and select the correct answer using the codes given below the columns.
Column−I Column−IIA. Coal gasP.(C2H6+C3H8+C4H10)B.Petroleum gasQ.(CH4+C2H6+C3H8+C4H10)C.Producer gasR.(H2+CH4+CO)D.Natural gasS.(CO+N2)
[C2H6−ethane, C3H8−propane, C4H10−butane]