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Consider the following reaction Thyroxine a thyroid hormone that helps to regulate metabolic rate .

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