Curd, cheese and butter are produced by

Options

A. Penicillium
B. Streptococcus
C. Saccharomyces
D. Pseudomonas

Answer

**Step-by-Step Solution:**

1. **Identify the Products**: The question asks about the production of curd, cheese, and butter. These are dairy products that are derived from milk.

2. **Understand the Microorganisms**: The options provided are:
- Penicillium
- Streptococcus
- Saccharomyces
- Pseudomonas

3. **Analyze Each Option**:
- **Penicillium**: This is a genus of fungi known for producing penicillin, an antibiotic. It is not involved in the production of dairy products.
- **Streptococcus**: This is a genus of bacteria. Specifically, *Streptococcus lactis* is known for its role in the fermentation of milk, leading to the production of lactic acid, which curdles milk and forms curd. This process is essential for making cheese and buttermilk as well.
- **Saccharomyces**: This is a genus of yeast, commonly known as baker's yeast. While it is used in baking and brewing, it is not primarily responsible for the production of curd, cheese, or butter.
- **Pseudomonas**: This genus of bacteria is mainly associated with agriculture and pathogen control, not with dairy product production.

4. **Conclusion**: Based on the analysis, *Streptococcus* is the microorganism responsible for the production of curd, cheese, and butter.

5. **Final Answer**: Therefore, the correct answer is **Streptococcus** (Option 2).

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