Which of the following is correctly matched for the product produced by them

Options

A. Acetobacter aceti : Antibiotics
B. Methanobacterium : Lactic acid
C. Penicillium notatum : Acetic acid
D. Sacchromyces cerevisiae : Ethanol

Answer

To solve the question regarding which of the following is correctly matched for the product produced by them, we will analyze each option provided.

### Step-by-Step Solution:

1. **Examine the first option: Acetobacter acetate produces antibiotics.**
- Acetobacter is a genus of bacteria known for its role in the fermentation process. It primarily converts ethanol into acetic acid, not antibiotics.
- **Conclusion:** This option is incorrect.

2. **Examine the second option: Methanobacterium produces lactic acid.**
- Methanobacterium is a genus of archaea that primarily produces methane through the anaerobic digestion of organic matter. It does not produce lactic acid.
- **Conclusion:** This option is incorrect.

3. **Examine the third option: Penicillium notatum produces acetic acid.**
- Penicillium notatum is a fungus known for producing the antibiotic penicillin, not acetic acid. Acetic acid is produced by bacteria like Acetobacter.
- **Conclusion:** This option is incorrect.

4. **Examine the fourth option: Saccharomyces cerevisiae produces ethanol.**
- Saccharomyces cerevisiae, commonly known as baker's or brewer's yeast, is well-known for its ability to ferment sugars to produce ethanol and carbon dioxide.
- **Conclusion:** This option is correct.

### Final Answer:
The only correct match in the given options is **option number four: Saccharomyces cerevisiae produces ethanol.**

---