Which of the following hormones is incorrectly paired with its function ?

Options

A. GnRH- controls release of FSH and LH
B. Oxytocin - stimulates uterine contractions during parturition
C. Fstrogen - responsible for primary and secondary female sex characteristics
D. Inhibin - stimulates secretion of estrogen by developing follicle

Answer

To determine which hormone is incorrectly paired with its function, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Identify the Hormones and Their Functions**:
- **GnRH (Gonadotropin-Releasing Hormone)**: It is responsible for the controlled release of FSH (Follicle-Stimulating Hormone) and LH (Luteinizing Hormone). This pairing is correct.
- **Oxytocin**: This hormone stimulates uterine contractions during parturition (childbirth). This pairing is also correct.
- **Estrogen**: This hormone is responsible for the development of primary and secondary female sexual characteristics, including regulation of the menstrual cycle and breast development. This pairing is correct as well.
- **Inhibin**: The function stated is that it stimulates secretion by developing follicles. However, inhibin actually inhibits the secretion of FSH from the anterior pituitary gland. This pairing is incorrect.

2. **Conclusion**:
- The hormone that is incorrectly paired with its function is **Inhibin**. The correct function of inhibin is to inhibit FSH secretion, not stimulate it.

### Final Answer:
The incorrectly paired hormone with its function is **Inhibin**.

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