ADH responsible for the reabsorption of water and reduction of urine secretion is synthesized by

Options

A. (a) Posterior pituitary gland
B. (b) Juxtaglomerular apparatus
C. (c) Anterior pituitary gland
D. (d) Hypothalamus

Answer

**Step-by-Step Solution:**

1. **Understanding ADH**: The question asks about ADH, which stands for Anti-Diuretic Hormone. It is crucial to know what this hormone does. ADH is responsible for regulating water balance in the body and reducing urine output.

2. **Function of ADH**: ADH works primarily by acting on the kidneys. It promotes the reabsorption of water from the kidney tubules back into the bloodstream. This process helps to concentrate the urine and reduce the volume of urine produced.

3. **Synthesis of ADH**: The key part of the question is identifying where ADH is synthesized. While ADH is released from the posterior pituitary gland, it is actually synthesized in the hypothalamus.

4. **Identifying the Correct Gland**: Among the options provided, the hypothalamus is the correct answer because it is the site of synthesis for ADH. The posterior pituitary gland stores and releases it, but the production occurs in the hypothalamus.

5. **Final Answer**: Therefore, the correct answer to the question is that ADH is synthesized by the hypothalamus.

**Answer**: D) Hypothalamus

---