Which of the following hormones does not contain a polypeptide?
(a) Oxytocin
(b) Prostaglandins
(c) Insulin
(d) ADH

Options

A. Oxytocin
B. Prostaglandins
C. Insulin
D. ADH.

Answer

To solve the question of which hormone does not contain a polypeptide, we need to analyze each option provided:

1. **Understanding the Options**:
- **Oxytocin**: This is a peptide hormone composed of a chain of amino acids (polypeptide).
- **Prostaglandins**: These are not peptide hormones; they are lipid compounds derived from fatty acids.
- **Insulin**: This is also a peptide hormone made up of amino acids (polypeptide).
- **ADH (Antidiuretic Hormone)**: Like oxytocin and insulin, ADH is a peptide hormone composed of amino acids (polypeptide).

2. **Identifying the Non-Polypeptide Hormone**:
- From the analysis, we see that oxytocin, insulin, and ADH are all peptide hormones. Therefore, they contain polypeptides.
- Prostaglandins, on the other hand, are derived from lipids and do not contain polypeptides.

3. **Conclusion**:
- The hormone that does not contain a polypeptide is **(b) Prostaglandins**.

### Final Answer:
(b) Prostaglandins