Idli is a fermented product of

Options

A. Rice
B. Maize
C. Barley
D. Black gram

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the fermented product that is used to make Idli. We need to identify the primary ingredient that undergoes fermentation.

2. **Identifying Fermented Foods**: Idli is a type of fermented food, which means it is produced through the process of fermentation. Fermentation is a metabolic process that converts sugars to acids, gases, or alcohol using microorganisms.

3. **Ingredients of Idli**: The primary ingredients for making Idli are black gram (urad dal) and rice. Both ingredients are soaked in water and then ground into a batter.

4. **Fermentation Process**: The batter made from black gram and rice is left to ferment. During fermentation, the microorganisms present in the environment (like bacteria and yeast) act on the batter, causing it to rise and develop a unique flavor.

5. **Nutritional Benefits**: Idli is not only a traditional Indian dish but also a nutritious food. It is a good source of protein, calories, and B-complex vitamins, particularly from the black gram.

6. **Conclusion**: Based on the fermentation process and the primary ingredient used, Idli is primarily a fermented product of black gram (urad dal). While rice is also included in the batter, the fermentation is mainly attributed to the black gram.

7. **Final Answer**: Therefore, Idli is a fermented product of black gram (option 4).