Which of the following pair is correct ?

Options

A. Testosterone – Secreted by Sertoli cells
B. FSH – Secreted by Leydig cells
C. ABP – Concentrates the testosterone
D. ICSH – Stimulates the leydig cells to secrete FSH

Answer

To determine which of the following pairs is correct regarding hormones involved in male reproduction, we will analyze each option step by step.

### Step 1: Analyze Option 1
- **Statement**: Testosterone secreted by Sertoli cells.
- **Explanation**: Testosterone is actually secreted by Leydig cells, not Sertoli cells. Sertoli cells support the development of sperm but do not produce testosterone.
- **Conclusion**: This statement is incorrect.

### Step 2: Analyze Option 2
- **Statement**: FSH secreted by Leydig cells.
- **Explanation**: Follicle Stimulating Hormone (FSH) is secreted by the pituitary gland, not Leydig cells. Leydig cells are responsible for producing testosterone.
- **Conclusion**: This statement is incorrect.

### Step 3: Analyze Option 3
- **Statement**: ABP concentrates the Testosterone.
- **Explanation**: Androgen Binding Protein (ABP) is produced by Sertoli cells and it binds to testosterone, helping to concentrate it in the seminiferous tubules. This is essential for spermatogenesis.
- **Conclusion**: This statement is correct.

### Step 4: Analyze Option 4
- **Statement**: ICSH stimulates the Leydig cells to secrete FSH.
- **Explanation**: Interstitial Cell Stimulating Hormone (ICSH), also known as Luteinizing Hormone (LH), stimulates Leydig cells to produce testosterone, not FSH. FSH is secreted by the pituitary gland.
- **Conclusion**: This statement is incorrect.

### Final Conclusion
The only correct pair among the options is **Option 3: ABP concentrates the Testosterone**.

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