Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct,

Options

A. Yeast - statins
B. Acetobacter aceti - acetic acid
C. Clostridium butylicum - lactic acid
D. Aspergillus niger - citric acid

Explanation

To solve the question of which one of the following is a wrong matching of a microbe and its industrial product, we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are:
- A) Yeast - Statins
- B) Acetobacter aceti - Acetic Acid
- C) Clostridium butylicum - Lactic Acid
- D) Aspergillus niger - Citric Acid

2. **Analyze Option A: Yeast - Statins**:
- Yeast, specifically *Monascus purpurus*, is known to produce statins, which are cholesterol-lowering drugs.
- This is a correct match.

3. **Analyze Option B: Acetobacter aceti - Acetic Acid**:
- *Acetobacter aceti* is a gram-negative bacterium that is used in the production of acetic acid from ethanol.
- This is also a correct match.

4. **Analyze Option C: Clostridium butylicum - Lactic Acid**:
- *Clostridium butylicum* is not known for producing lactic acid; instead, it is involved in the production of butyric acid.
- Lactic acid is primarily produced by *Lactobacillus* species.
- Therefore, this is the incorrect match.

5. **Analyze Option D: Aspergillus niger - Citric Acid**:
- *Aspergillus niger* is a fungus that is widely used in the commercial production of citric acid.
- This is a correct match.

6. **Conclusion**: The wrong matching of a microbe and its industrial product is:
- C) Clostridium butylicum - Lactic Acid

### Final Answer:
C) Clostridium butylicum - Lactic Acid

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