Iodine is present in the secretion of

Options

A. Adrenal
B. Thyroid
C. Pancreas
D. Pituitary

Answer

**Step-by-Step Solution:**

1. **Identify the Glands**: The question asks about the presence of iodine in the secretion of specific glands: adrenal gland, thyroid gland, pancreas, or pituitary gland.

2. **Understand the Role of Iodine**: Iodine is a crucial element for the synthesis of certain hormones in the body. It is particularly known for its role in the production of thyroid hormones.

3. **Focus on the Thyroid Gland**: The thyroid gland is responsible for producing hormones such as thyroxine (T4) and triiodothyronine (T3). These hormones are essential for regulating metabolism and growth.

4. **Link Iodine to Thyroid Hormones**: Iodine is necessary for the synthesis of thyroxine. Without adequate iodine, the thyroid cannot produce enough of this hormone.

5. **Consequences of Iodine Deficiency**: A lack of iodine in the diet can lead to conditions such as simple goiter (enlargement of the thyroid gland) and hypothyroidism (reduced hormone production).

6. **Conclusion**: Based on the above points, it is clear that iodine is present in the secretion of the thyroid gland.

**Final Answer**: Iodine is present in the secretion of the **thyroid gland**.

---