Select the correct pairing .

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 between microorganisms and their products, let's analyze each option step by step.

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

**Hint:** Remember that Aspergillus niger is associated with citric acid production.

### Step 2: Analyze Option B - Monascus Purpureus and Statins
- Monascus purpureus is a yeast that is known to produce statins, which are cholesterol-lowering agents.
- **Conclusion:** This pairing is correct.

**Hint:** Statins are linked to Monascus purpureus, often used in traditional fermentation processes.

### Step 3: Analyze Option C - Streptococcus and Cyclosporine
- Cyclosporin A is an immunosuppressive agent used primarily in organ transplantation.
- It is produced by a fungus called Trichoderma polysporum, not by Streptococcus.
- **Conclusion:** This pairing is incorrect.

**Hint:** Cyclosporin A is not produced by Streptococcus; look for Trichoderma polysporum instead.

### Step 4: Analyze Option D - Methanogens and Cheese
- Methanogens are archaea that produce methane gas, especially in anaerobic conditions.
- Cheese, particularly Swiss cheese, is produced by bacteria like Propionibacterium shermanii, which produces carbon dioxide (CO2) that creates holes in the cheese.
- **Conclusion:** This pairing is incorrect.

**Hint:** Methanogens produce methane, not cheese; cheese production involves specific bacteria.

### Final Conclusion
After analyzing all the options, the only correct pairing is:
- **Monascus purpureus - Statins.**

Thus, the correct answer is **Option B**.