Alcohol can be converted into vinegar by the action of micro - organisms called :

Options

A. viruses
B. yeast
C. protozoa
D. bacteria

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which micro-organisms are responsible for converting alcohol into vinegar.

2. **Identifying the Process**: The conversion of alcohol into vinegar involves a biochemical process known as oxidation. During this process, alcohol is oxidized to form acetic acid, which is the main component of vinegar.

3. **Micro-organisms Involved**: The specific micro-organisms that facilitate this conversion are known as *yeasts* and *acetic acid bacteria*. Yeasts convert sugars into alcohol, and then acetic acid bacteria oxidize the alcohol into acetic acid.

4. **Conclusion**: Therefore, the micro-organisms that convert alcohol into vinegar are primarily *acetic acid bacteria*.

5. **Final Answer**: The correct answer is *acetic acid bacteria*.

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