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Which of the following have `-M` effect (`overline e` - withdrawing mesomeric effect) ?A. B. `- SO_3H`C. `-OR`D. `-Br` |
Answer» Correct Answer - A::B (a,b) Here `(a)` and `(b)` do not have `LP overline e^, s`, but `( c)` and `(d)` have `-ddotunderset(..)OR,-ddotunderset(..)Br:` |
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