A.(CH3)3CCOOH B.(CH3)2CHCOOH C.CH3CH2CH2COOH D.CH3COOH
A.CH3OH B.CH3CH2OH C.(CH3)2CHOH D.(CH3)3COH
A.CH3COOC2H5 B.CH3COCl C.CH3CONH2 D.(CH3CO)2O