1.

Which of the following series contains atoms/groups having only-M(mesomeric) effect ?A. `COR,OR,COOR`B. `Cl,CHO,NH_(2)`C. `NO_(2),CN,SO_(3)H`D. `OH,NR_(2),SR`

Answer» Correct Answer - C
`-NO_(2),-CN,-SO_(3)` H have - M effect.


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