Which of the following compounds does not con | vedclass

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(C) The functional groups of the given compounds are as follows:$1$. Phenol: $Ar-OH$ (contains $-OH$ group)$2$. Carboxylic acid: $R-COOH$ (contains $-

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Aldehydes

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(C) The functional groups of the given compounds are as follows:$1$. Phenol: $Ar-OH$ (contains $-OH$ group)$2$. Carboxylic acid: $R-COOH$ (contains $-OH$ group in the carboxyl moiety)$3$. Aldehydes: $R-CHO$ (contains a carbonyl group,not an $-OH$ group)$4$. Alcohols: $R-OH$ (contains $-OH$ group)Therefore,aldehydes do not contain an $-OH$ group.

Which of the following compounds does not contain an $-OH$ group?

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