The set of meta-directing functional groups f | vedclass

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(C) Meta-directing groups are those that withdraw electrons from the benzene ring through the inductive effect $(-I)$ and/or resonance effect $(-M)$.I

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$-NO_2, -CHO, -SO_3H, -COR$

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(C) Meta-directing groups are those that withdraw electrons from the benzene ring through the inductive effect $(-I)$ and/or resonance effect $(-M)$.In option $C$,all the groups $(-NO_2, -CHO, -SO_3H, -COR)$ are electron-withdrawing groups that exhibit a $-M$ effect,making them meta-directing.In other options,groups like $-NH_2, -NHR, -OCH_3$ and $-NHCOCH_3$ are ortho/para-directing due to their $+M$ effect.

The set of meta-directing functional groups from the following sets is:

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