A.CH3CHO B.CH3CH2OH C.CH3CH2CHO D.CH3COCH3
A.CH3CH2OH B.CH3CHO C.CH3COOH D.CH3CH2-O-CH2CH3
A.CH3COCH3 B.C6H5-COCH3 C.CH2=CH2 D.CH3CHO