Dosa and dilli are the fermented prepatations of rice and black gram fermentation is done with

Options

A. Leuconostoc
B. Streptococcus
C. Saccharomyces
D. More than one option is correct

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the fermentation process involved in making dosa and idli, which are traditional Indian foods made from rice and black gram.

2. **Identifying the Ingredients**: Dosa and idli are primarily made from a batter that consists of rice and black gram (urad dal).

3. **Recognizing the Role of Fermentation**: Fermentation is a crucial step in the preparation of dosa and idli. It helps in the development of flavor and texture, making the batter fluffy due to the production of carbon dioxide (CO2).

4. **Identifying the Microbes Involved**: The fermentation process is primarily facilitated by certain microorganisms. In this case, two types of microbes are significant:
- **Leuconostoc**: This is a type of gram-positive bacteria that contributes to the fermentation process by producing CO2.
- **Saccharomyces cerevisiae**: Commonly known as baker's yeast, this fungus is also involved in the fermentation process and is known for its ability to produce CO2 and alcohol.

5. **Evaluating the Options**: The options provided are:
- Leuconostoc
- Streptococcus
- Saccharomyces
- More than one option is correct

From our understanding, Leuconostoc and Saccharomyces cerevisiae are both involved in the fermentation process, while Streptococcus does not play a significant role in this context.

6. **Conclusion**: Therefore, the correct answer to the question is that fermentation is done with more than one option, specifically Leuconostoc and Saccharomyces cerevisiae.

### Final Answer:
Fermentation for dosa and idli is done with Leuconostoc and Saccharomyces cerevisiae. Therefore, the correct option is "more than one option is correct."

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