Select the correct pairing of the microorganism with its product

Options

A. `{:("A Micro organism",B "Product"),("Aspergillus niger","Acetic acid"):}`
B. `{:("A Micro organism",B "Product"),("Monascus purpureus","Statins"):}`
C. `{:("A Micro organism",B "Product"),("Streptococcus","Cyclosporin A"):}`
D. `{:("A Micro organism",B "Product"),("Methanogens","Cheese"):}`

Answer

To solve the question of selecting the correct pairing of the microorganism with its product, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Option A: Aspergillus niger and Acetic Acid**
- Aspergillus niger is a fungus primarily known for producing citric acid, not acetic acid.
- Acetic acid is produced by Acetobacter aceti, a type of bacteria.
- **Conclusion**: This pairing is incorrect.

2. **Option B: Monascus purpureus and Statins**
- Monascus purpureus is a yeast that is indeed known for producing statins, which are cholesterol-lowering agents.
- Statins inhibit the enzyme responsible for cholesterol synthesis in the body.
- **Conclusion**: This pairing is correct.

3. **Option C: Streptococcus and Cyclosporine A**
- Streptococcus is a genus of bacteria known for producing streptokinase, which is used as a clot buster in myocardial infarction cases.
- Cyclosporine A is produced by the fungus Trichoderma polysporum and is used as an immunosuppressant in organ transplants.
- **Conclusion**: This pairing is incorrect.

4. **Option D: Methanogens and Cheese**
- Methanogens are microorganisms that produce methane and are primarily used in biogas production.
- Cheese is produced by various bacteria and fungi, not methanogens.
- **Conclusion**: This pairing is incorrect.

### Final Answer:
The only correct pairing is **Option B: Monascus purpureus and Statins**.