Cyclosporin A is produced from -

Options

A. Trichoderma polysporum (a fungus)
B. Bacillus (a bacterium)
C. Aspergillus (a fungus)
D. all of these

Answer

**Step-by-Step Solution:**

1. **Identify the Substance**: The question asks about Cyclosporin A, which is known to be an immunosuppressant.

2. **Determine the Source**: Cyclosporin A is produced by a specific organism. In this case, it is produced by a type of fungus.

3. **Specify the Organism**: The specific fungus that produces Cyclosporin A is called *Trichoderma polysporum*.

4. **Understand the Application**: Cyclosporin A is primarily used in medical settings, particularly for organ transplants, to prevent the body from rejecting the transplanted organ.

5. **Conclude the Answer**: Therefore, the correct answer to the question is that Cyclosporin A is produced from *Trichoderma polysporum*.

**Final Answer**: Cyclosporin A is produced from *Trichoderma polysporum*.

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