Which of the hormone is polypeptide?

Options

A. LH
B. FSH
C. Insulin
D. Thyroxine

Answer

To determine which hormone is a polypeptide, we will analyze each of the given options.

### Step-by-Step Solution:

1. **Identify the Hormones**: The options provided are:
- Option 1: LH (Luteinizing Hormone)
- Option 2: FSH (Follicle Stimulating Hormone)
- Option 3: Insulin
- Option 4: Thyroxine

2. **Understand Polypeptides**: Polypeptides are chains of amino acids and are typically hormones that are water-soluble. They include hormones such as insulin, growth hormone, and others.

3. **Analyze Each Option**:
- **Option 1: LH (Luteinizing Hormone)**: LH is a glycoprotein hormone, not a polypeptide.
- **Option 2: FSH (Follicle Stimulating Hormone)**: FSH is also a glycoprotein hormone, similar to LH, and is not classified as a polypeptide.
- **Option 3: Insulin**: Insulin is a polypeptide hormone composed of a chain of amino acids. It plays a crucial role in glucose metabolism.
- **Option 4: Thyroxine**: Thyroxine is an amino acid-derived hormone (specifically from tyrosine) and is not a polypeptide.

4. **Conclusion**: Based on the analysis, the hormone that is a polypeptide is **Insulin**.

### Final Answer:
The hormone that is a polypeptide is **Insulin** (Option 3).

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