The malfunctioning of the thyroid gland is due to the deficiency of __________.
Correct Answer : c ) IodineExplanation :
Iodine is a mineral that is found in various foods and iodized salt. It is an important component of the thyroid hormones thyroxine (T4) and triiodothyronine (T3) which regulate many important biochemical reactions in the human body. Therefore, the deficiency of Iodine causes malfunctioning of the thyroid gland.
Sources of Iodine are Dairy products, eggs, seafood, human breast milk, etc.
Deficiency of Calcium causes Hypocalcemia which may lead to dental changes, cataracts, alterations in the brain, osteoporosis, etc.
Deficiency of Iron causes Anemia.
Deficiency of Vitamin A leads to night blindness.
Hence, option (c) is correct.