Which one of the following is a transgenic product useful for treatment of Haemophilia?

Options

A. Factor VIII
B. Antithrombin II
C. `alphA-1`-antitrypsin
D. Lysostaphin

Answer

**Step-by-Step Solution:**

1. **Understanding Hemophilia**:
- Hemophilia is an inherited genetic disorder that affects the blood's ability to clot. This results in continuous bleeding, especially after injuries.

2. **Types of Hemophilia**:
- There are two main types of hemophilia:
- **Hemophilia A**: Caused by a deficiency or mutation in clotting factor VIII.
- **Hemophilia B**: Caused by a deficiency or mutation in clotting factor IX.

3. **Identifying the Transgenic Product**:
- The question asks for a transgenic product useful for treating hemophilia.
- For Hemophilia A, the treatment involves administering factor VIII, which can be produced through recombinant DNA technology (making it a transgenic product).
- For Hemophilia B, the treatment would involve factor IX.

4. **Evaluating the Options**:
- The options provided are:
- Factor VIII
- Antithrombin II
- Alpha-A1 antitrypsin
- Lysostaphene
- Among these, **Factor VIII** is specifically related to the treatment of Hemophilia A.

5. **Conclusion**:
- Since the question does not specify which type of hemophilia it refers to, and Factor VIII is a transgenic product used for treating Hemophilia A, the correct answer is **Factor VIII**.

**Final Answer**: Factor VIII

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