Which one is useful as immunosuppressive agent in organ transplant?

Options

A. Cyclosporin C
B. Cyclosporin L
C. Cyclosporin A
D. All the above

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for an immunosuppressive agent that is useful in organ transplants. Immunosuppressive agents are crucial in preventing the rejection of transplanted organs by suppressing the immune response.

2. **Identifying the Options**: The options provided are:
- Cyclosporine C
- Cyclosporine L
- Cyclosporine A
- All of the above

3. **Analyzing the Options**:
- Cyclosporine A is well-known for its use in organ transplantation as it effectively suppresses the immune response.
- Cyclosporine C and Cyclosporine L are less commonly referenced in the context of organ transplantation.

4. **Conclusion**: Based on the information, Cyclosporine A is the most widely used immunosuppressive agent in organ transplants. Therefore, the correct answer is **Cyclosporine A**.

5. **Additional Information**: Cyclosporine A is derived from the fungus *Trichoderma* through a fermentation process. Its widespread use is due to its effectiveness and the ease of production.

**Final Answer**: Cyclosporine A is the useful immunosuppressive agent in organ transplant.

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