Chemical substance present on the surface of sperm is

Options

A. Hyalouronidase
B. Antifertilizin
C. Agglutinin
D. Fertilizin.

Answer

To answer the question regarding the chemical substance present on the surface of sperm, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Components of Sperm**: Sperm cells have various components, including enzymes and proteins on their surface that play roles in fertilization.

2. **Identify the Options**: The options provided are:
- A) Hyaluronidase
- B) Antifortalizing
- C) Aglutin
- D) De-fertilizing

3. **Research Each Option**:
- **Hyaluronidase**: An enzyme that helps in breaking down hyaluronic acid, facilitating sperm penetration through the egg's protective layers.
- **Antifortalizing**: A chemical substance that interacts with the fertilizing substance released by the egg, preventing premature fertilization.
- **Aglutin**: A substance that can cause agglutination or clumping of cells, not specifically related to sperm function.
- **De-fertilizing**: This term generally refers to substances that inhibit fertilization.

4. **Determine the Correct Answer**: Based on the functions of these substances, antifortalizing is specifically known for its role in preventing fertilization by interacting with the fertilizing substance from the egg.

5. **Conclusion**: The chemical substance present on the surface of sperm is **Antifortalizing**.

### Final Answer:
The correct answer is **B) Antifortalizing**.

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