Streptococcus is used in preparation of

Options

A. Wine
B. Idli
C. Cheese
D. Bread.

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question mentions "Streptococcus," which is a genus of bacteria.

2. **Understand the Role of Streptococcus**: Streptococcus is known for its role in various fermentation processes. It is particularly important in the dairy industry.

3. **Consider the Options**: The options given are wine, bread, and cheese. We need to determine which of these involves the use of Streptococcus.

4. **Analyze Fermentation Processes**:
- **Wine**: Typically involves yeast (Saccharomyces cerevisiae) for fermentation.
- **Bread**: Also primarily uses yeast for leavening and fermentation.
- **Cheese**: Involves lactic acid bacteria, including Streptococcus, for the fermentation of milk.

5. **Conclusion**: Since Streptococcus is specifically used in the fermentation process of cheese, the correct answer is cheese.

**Final Answer**: Streptococcus is used in the preparation of cheese.

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