Which of the following is not a Lewis base?
arrange the following
a) C2H5NH2 , (C2H5)2NH, (C2H5)3N, C6H5NH2 [BASIC NATURE ]
B) CCL3COOH , CHCL2COOH , CH2CLCOOH [ACIDIC STRENGTH ]
C) CH3CHO , C2H5OH , C2H5OC2H5 , CH3COOH [BOILING PT.]