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B
C6H5−COOH
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C
C6H5CH2COOH
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D
CH3COCH2COOH
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Solution
The correct option is CCH3COCH2COOH The correct option is D. CH3COCH2COOH is a β-keto acid. Thus decarboxylation is maximum in a carboxylic acid containing an electron withdrawing group such as =CO or COOH at the β-carbon atom with respect to the −COOH group.