The correct answer is D. Iodine.
Goitre is a condition in which the thyroid gland becomes enlarged. It is caused by a lack of iodine in the diet. Iodine is a mineral that is essential for the production of thyroid hormones. These hormones are responsible for regulating metabolism, growth, and development.
When there is a lack of iodine, the thyroid gland enlarges in an attempt to produce more thyroid hormones. This can lead to a number of symptoms, including a swollen neck, difficulty swallowing, and hoarseness.
Goitre can be treated with iodine supplements. In severe cases, surgery may be necessary to remove part of the thyroid gland.
Calcium is a mineral that is important for bone health. It is also involved in muscle contraction, nerve function, and blood clotting. Zinc is a mineral that is important for immune function, wound healing, and cell growth. Selenium is a mineral that is important for antioxidant defense and thyroid function.
A deficiency of any of these minerals can lead to a number of health problems, but goitre is not one of them.