Q.

The inductive effects of the group CH3,COO,Br,NH3+ respectively are

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a

+I, –I, +I, +I

b

+I, +I, –I, –I

c

–I, –I, +I, +I

d

–I, +I, –I, +I

answer is B.

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Detailed Solution

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Methyl group and carboxylate group (–COO) both give electron donating +I effect while –Br and –NH3+ give electron withdrawing –I effect.

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