1.

Consider the following reaction Thyroxine a thyroid hormone that helps to regulate metabolic rate . A. .B. .C. .D. .

Answer» Correct Answer - D
Electrophilic substitution takes place ortho to `(-OH)` group not ortho to`(-underset(••)overset(••)(O)-)` group Since it is deactivated by the strong -e withdrawing group `(-COO^(-) and overset(+)NH_(3))` in the another ring .


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