Identify the most acidic hydrogen in the give | vedclass

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Question

(A) The hydrogen labeled as $a$ is the most acidic because it is part of a carboxylic acid group $(-COOH)$.Upon losing a proton,the resulting carboxyl

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$a$

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(A) The hydrogen labeled as $a$ is the most acidic because it is part of a carboxylic acid group $(-COOH)$.Upon losing a proton,the resulting carboxylate anion $(R-COO^-)$ is stabilized by resonance,where the negative charge is delocalized over two equivalent oxygen atoms,making it significantly more stable than the anions formed by removing hydrogens from the other positions (alcohol $-OH$,thiol $-SH$,or $\alpha$-hydrogen to a carbonyl).

Identify the most acidic hydrogen in the given compound.

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