Which of the following is a mineralocorticold ?

Options

A. testosterone
B. progesterone
C. adrenaline
D. aldosterone

Answer

To determine which of the following is a mineralocorticoid, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understand the Definition**:
- Mineralocorticoids are a class of steroid hormones produced by the adrenal cortex that regulate sodium and potassium levels in the body, thus influencing blood pressure and fluid balance.

2. **Evaluate Each Option**:
- **Option 1: Testosterone**
- Testosterone is an androgen hormone produced by the testes. It is primarily involved in the development of male secondary sexual characteristics and spermatogenesis.
- **Conclusion**: Not a mineralocorticoid.

- **Option 2: Estrogen**
- Estrogen is a group of hormones primarily involved in the regulation of the female reproductive system and secondary sexual characteristics. It is produced mainly by the ovaries.
- **Conclusion**: Not a mineralocorticoid.

- **Option 3: Adrenaline**
- Adrenaline (also known as epinephrine) is produced by the adrenal medulla and is involved in the body's fight-or-flight response. It helps prepare the body for emergency situations.
- **Conclusion**: Not a mineralocorticoid.

- **Option 4: Aldosterone**
- Aldosterone is a hormone produced by the adrenal cortex, specifically from the zona glomerulosa. It plays a crucial role in regulating sodium and potassium levels, thus maintaining blood pressure and fluid balance.
- **Conclusion**: This is a mineralocorticoid.

3. **Final Answer**:
- The correct answer is **Aldosterone** (Option 4).