Select the mismatched pair

Options

A. Adrenaline : Pituitary gland
B. Testosterone : Testes
C. Estrogen : Ovary
D. Thyroxin : Thyroid gland

Explanation

To solve the question of selecting the mismatched pair, we will analyze each option provided:

1. **Adrenaline and Pituitary Gland**:
- Adrenaline is a hormone that is released from the adrenal glands, not the pituitary gland. The pituitary gland is often referred to as the master gland because it secretes various hormones, but adrenaline is not one of them. Therefore, this pair is mismatched.

2. **Testosterone and Testis**:
- Testosterone is a hormone that is correctly matched with the testis, as it is produced in the male reproductive organs. This pair is correctly matched.

3. **Thyroxine and Thyroid Gland**:
- Thyroxine is a hormone produced by the thyroid gland. This pair is also correctly matched.

Based on the analysis, the mismatched pair is:
- **Adrenaline and Pituitary Gland**

### Step-by-Step Solution:
1. Identify the hormones and their corresponding glands from the options provided.
2. Check the accuracy of each pairing:
- Adrenaline → Adrenal Gland (correct)
- Testosterone → Testis (correct)
- Thyroxine → Thyroid Gland (correct)
3. Determine which pairing does not match:
- Adrenaline is incorrectly matched with the pituitary gland.
4. Conclude that the mismatched pair is **Adrenaline and Pituitary Gland**.