Which of the following groups does not show ( | vedclass

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(D) The resonance effect ($R$ effect) is the polarity produced in a molecule by the interaction of two $\pi$-bonds or between a $\pi$-bond and a lone

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$IV$. $-OH$

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(D) The resonance effect ($R$ effect) is the polarity produced in a molecule by the interaction of two $\pi$-bonds or between a $\pi$-bond and a lone pair of electrons present on an adjacent atom.Groups like $-CHO$,$-COOH$,and $-CN$ contain multiple bonds with electronegative atoms,which withdraw electron density from the conjugated system,thus showing a $(-R)$ effect.Conversely,the $-OH$ group possesses lone pairs of electrons on the oxygen atom that can be donated into the conjugated system,thereby exhibiting a $(+R)$ effect.

Which of the following groups does not show $(-R)$ effect?

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