The anticogulant hirudin is obtained from :

Options

A. Ti plasmid of Agrobacterium
B. Bt toxin produced by cry gene
C. Seeds of Brassica napus
D. None of the above

Answer

To solve the question about the source of the anticoagulant hirudin, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the source of the anticoagulant hirudin. We need to identify which option correctly indicates where hirudin is obtained from.

2. **Analyze the Options**:
- **Option A**: Ti plasmid of Agrobacterium - This is primarily used for genetic transformation in plants, not for producing hirudin.
- **Option B**: Bt toxin produced by Cry gene - This toxin is derived from Bacillus thuringiensis and is used for pest resistance in crops, not related to hirudin.
- **Option C**: Seeds of Brassica napus - This option suggests that hirudin can be produced from these seeds.
- **Option D**: None of the above - This option suggests that none of the previous options are correct.

3. **Identify the Correct Source**:
- Hirudin is a protein with anticoagulant properties. It is originally produced by leeches. However, the gene encoding for hirudin has been isolated and inserted into Brassica napus (rapeseed) for recombinant production. Therefore, the correct answer is **Option C**.

4. **Conclusion**: Based on the analysis, the anticoagulant hirudin is obtained from the seeds of Brassica napus.

### Final Answer:
The anticoagulant hirudin is obtained from **C. seeds of Brassica napus**.

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