Transgenic hirudin is obtained from the transgenic plant named as:

Options

A. Brassica napus
B. Osmium sanctum
C. Tomato
D. Vinea rosea

Answer

**Step-by-Step Solution:**

1. **Understanding Transgenic Hirudin**: Hirudin is a potent anticoagulant derived from the saliva of leeches, specifically used to prevent blood clotting.

2. **Identifying the Source Plant**: The question asks about the transgenic plant from which transgenic hirudin is obtained. Transgenic plants are genetically modified to express certain traits or produce specific proteins.

3. **Recognizing the Correct Plant**: The transgenic plant known for producing hirudin is *Brassica napus*, commonly referred to as rapeseed or canola. This plant has been genetically engineered to produce hirudin, allowing for its extraction and use in medical applications.

4. **Eliminating Incorrect Options**: Other plants mentioned, such as tomato, have been used for various transgenic applications but are not associated with the production of hirudin. Therefore, they can be ruled out.

5. **Conclusion**: The correct answer to the question is that transgenic hirudin is obtained from the transgenic plant *Brassica napus*.

**Final Answer**: Transgenic hirudin is obtained from the transgenic plant named *Brassica napus*.

---