Identify the correct statement on inhibin

Options

A. Inhibits the secretion of LH,FSH and prolactin
B. Is produced by granulose cells in ovary and inhibits the secretion of FSH
C. Is produced by granulose cells in ovary and inhibits the secretion of LH
D. Is produced by nurse cells in tests and inhibits the secretion of LH

Answer

### Step-by-Step Solution

1. **Understanding Inhibin**: Inhibin is a hormone that plays a role in the regulation of reproductive hormones. It primarily inhibits the secretion of follicle-stimulating hormone (FSH) from the pituitary gland.

2. **Evaluating the Statements**:
- **Statement 1**: "Inhibin inhibits the secretion of luteinizing hormone, follicular stimulating hormone, and prolactin."
- This statement is incorrect because inhibin primarily inhibits FSH and does not significantly affect LH or prolactin.

- **Statement 2**: "It is produced by granulosa cells of the ovary and inhibits the secretion of FSH."
- This statement is correct. Inhibin is indeed produced by the granulosa cells in the ovaries and it specifically inhibits FSH secretion.

- **Statement 3**: "It is produced by granulosa cells in the ovary and inhibits the secretion of LH."
- This statement is incorrect. Inhibin does not inhibit LH; it primarily inhibits FSH.

- **Statement 4**: "It is produced by nurse cells in the testis and inhibits the secretion of luteinizing hormone."
- This statement is also incorrect. Inhibin is produced by Sertoli cells in the testes, and it primarily inhibits FSH, not LH.

3. **Conclusion**: The only correct statement regarding inhibin is Statement 2, which states that it is produced by granulosa cells of the ovary and inhibits the secretion of FSH.

### Final Answer
The correct statement on inhibin is: **It is produced by granulosa cells of the ovary and inhibits the secretion of FSH.**

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