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Question

_______ is necessary for the thyroid gland to make thyroxine hormone.

This question was previously asked in
RRB Group D 2025 Question Paper (18-Aug-2026) (Shift 1)
The correct answer is

Iodine

Iodine is an essential micronutrient required by the thyroid gland to synthesise the hormone thyroxine. Hence, the correct answer is Iodine.

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