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

Options

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

Answer

To determine which of the following options is correctly matched with the product produced by them, we will analyze each option step by step.

### Step 1: Analyze Methanobacterium
- **Product**: Lactic Acid
- **Actual Product**: Methane
- **Conclusion**: Methanobacterium is known for producing methane gas, not lactic acid. Therefore, this option is incorrect.

### Step 2: Analyze Penicillium notatum
- **Product**: Acetic Acid
- **Actual Product**: Antibiotics
- **Conclusion**: Penicillium notatum is famous for producing penicillin, an antibiotic, not acetic acid. Therefore, this option is incorrect.

### Step 3: Analyze Saccharomyces cerevisiae
- **Product**: Ethanol
- **Actual Product**: Ethanol
- **Conclusion**: Saccharomyces cerevisiae is a yeast used in the fermentation process to convert glucose into ethanol. Therefore, this option is correct.

### Step 4: Analyze Acetobacter acetii
- **Product**: Antibiotic
- **Actual Product**: Vinegar
- **Conclusion**: Acetobacter acetii is known for converting ethanol into acetic acid, which is used in vinegar production, not for producing antibiotics. Therefore, this option is incorrect.

### Final Conclusion
The only correctly matched option is **Saccharomyces cerevisiae** producing **Ethanol**.