Identify the mismatched combination from the follwing

Options

A. 1)Peptide hormone-vasopressin
B. 2)Protein hormone-Insulin
C. 3)Amine hormone-Melatonin
D. 4)Oestrogen-Protein hormone

Answer

To solve the question of identifying the mismatched combination from the given options, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Option 1: Peptide hormone - Vasopressin**
- Vasopressin, also known as Antidiuretic Hormone (ADH), is indeed a peptide hormone.
- It is secreted by the posterior lobe of the pituitary gland.
- **Conclusion**: This combination is correctly matched.

2. **Option 2: Protein hormone - Insulin**
- Insulin is a hormone secreted by the pancreas.
- The pancreas has both endocrine (insulin secretion) and exocrine (digestive enzyme secretion) functions.
- Insulin is classified as a protein hormone.
- **Conclusion**: This combination is correctly matched.

3. **Option 3: Amine hormone - Melatonin**
- Melatonin is derived from the amino acid tryptophan.
- It is classified as an amine hormone.
- **Conclusion**: This combination is correctly matched.

4. **Option 4: Estrogen - Protein hormone**
- Estrogen is known as a female sex hormone.
- It is classified as a steroid hormone, not a protein hormone.
- **Conclusion**: This combination is mismatched.

### Final Answer:
The mismatched combination is **Option 4: Estrogen is a protein hormone**.

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