ADH, responsible for reabsorption of water and reduction of urine secretion, is synthesized by :-

Options

A. (1) posterior pituatary gland
B. (2) juxtaglomerular apparatus
C. (3) hypothalamus
D. (4) anterior pituitary gland

Answer

**Step-by-Step Solution:**

1. **Understanding ADH**: Antidiuretic hormone (ADH), also known as vasopressin, plays a crucial role in regulating water balance in the body. It is responsible for the reabsorption of water in the kidneys and helps reduce urine secretion.

2. **Identifying the Source of ADH**: The question asks where ADH is synthesized. To answer this, we need to know the anatomical structures involved in the production of ADH.

3. **Reviewing the Options**: The options provided are:
- A) Posterior pituitary gland
- B) Juxtaglomerular apparatus
- C) Hypothalamus
- D) Anterior pituitary gland

4. **Analyzing Each Option**:
- **Posterior Pituitary Gland**: While the posterior pituitary gland stores and releases ADH, it does not synthesize it.
- **Juxtaglomerular Apparatus**: This structure is involved in regulating blood pressure and does not synthesize ADH.
- **Hypothalamus**: The hypothalamus is responsible for synthesizing ADH, which is then transported to the posterior pituitary for storage and release.
- **Anterior Pituitary Gland**: This gland produces different hormones but does not synthesize ADH.

5. **Conclusion**: Since ADH is synthesized in the hypothalamus and stored in the posterior pituitary gland, the correct answer to the question is that ADH is synthesized by the hypothalamus.

**Final Answer**: C) Hypothalamus

---