Which of the following is a mineralocortiocid?

Options

A. Testosterone
B. Progesterone
C. Adrenaline
D. Aldosterone

Explanation

To determine which of the following is a mineralocorticoid, we will analyze the options provided: Testosterone, Progesterone, Adrenaline, and Aldosterone.

### Step-by-Step Solution:

1. **Understanding Mineralocorticoids**:
- Mineralocorticoids are a class of steroid hormones that primarily influence the metabolism of minerals in the body, particularly sodium and potassium.

2. **Analyzing the Options**:
- **Testosterone**: This is a male sex hormone that plays a key role in the development of male reproductive tissues and secondary sexual characteristics. It does not regulate mineral metabolism.
- **Progesterone**: This is a female sex hormone involved in the menstrual cycle and pregnancy. It does not have a role in mineral metabolism.
- **Adrenaline**: Also known as epinephrine, this hormone is produced by the adrenal glands and is involved in the body's fight-or-flight response. It does not regulate minerals.
- **Aldosterone**: This is a hormone produced by the adrenal cortex and is a key mineralocorticoid. It regulates sodium and potassium levels in the body and is often referred to as the "salt-retaining hormone."

3. **Identifying the Correct Answer**:
- Among the options, Aldosterone is the only hormone that fits the definition of a mineralocorticoid as it directly regulates mineral metabolism.

### Conclusion:
The correct answer is **Aldosterone**.

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