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NEET levelSingle correct optionDifficulty 1 of 3g1030

Which of the following is a -M group?

A $- CN$
B $- Cl$
C $- NH X_{2}$
D $- OCH X_{3}$

Answer: A

- CN

has a polar C#N pi bond that pulls pi electrons from the attached system (-M).

- OCH X_{3}

,

- Cl

and

- NH X_{2}

donate lone pairs (+M).

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