JEE Main Chemistry question

The IUPAC name of the compound CH_3-CO-CH(Cl)-CH(Br)-COOH is:

(A)2-bromo-3-chloro-4-oxopentanoic acidCorrect
(B)3-chloro-2-bromo-4-oxopentanoic acid
(C)4-carboxybromo-3-chloro-2-butanone
(D)None of the above

Answer: (A)

Solution

Numbering the five-carbon chain from the carboxylic acid carbon (C-1, which must receive the lowest possible locant as the principal characteristic group) gives: C-1

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Question ID VK-148329