Element ................ is essential for the synthesis of thyroxine.
A
Iodine
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B
Magnesium
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C
Manganese
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D
Zinc
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Solution
The correct option is B Iodine The thyroid gland produces two types of hormones namely, T3 and T4 (Thyroxine). Thyroxine is the main hormone secreted (into the bloodstream) by the thyroid gland. It is the inactive form and it is converted to an active form (triiodothyronine) by organs such as the liver and kidneys.
Iodine is an essential element for the synthesis of the hormone, thyroxine.