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B
2, 4-dimethyl hexanoic acid
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C
2-methyl-4-ethyl pentanoic acid
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D
4-ethyl-2-methyl pentanoic acid
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Solution
The correct option is B 2, 4-dimethyl hexanoic acid Carboxylic carbon is numbered as 1 as per the priority rule.Consider the longest carbon chain, at C-2 and C-4, methyl group is present and total 6 carbon atoms are present in longest carbon chain, hence name is 2,4-dimethyl hexanoic acid