Indian curd is prepared by inoculating milk with ___________.

Options

A. Lactobacillus acidophilus
B. Lactobacillus bulgaricus
C. Penicillium roquefortii
D. Penicillium camembertii

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the specific microorganism used to prepare Indian curd by inoculating milk.

2. **Identifying the Microorganism**: In Indian curd preparation, specific bacteria are used to ferment the milk. The primary bacterium responsible for this process is Lactobacillus acidophilus.

3. **Role of Lactobacillus acidophilus**: This bacterium ferments lactose (the sugar present in milk) into lactic acid. This process not only thickens the milk but also gives curd its characteristic tangy flavor.

4. **Other Options**: The question provides other options like Lactobacillus bulgaricus, Penicillium roqueforti, and Penicillium camemberti.
- Lactobacillus bulgaricus is also a fermenting bacterium but is more commonly associated with yogurt rather than traditional Indian curd.
- Penicillium roqueforti and Penicillium camemberti are fungi used in cheese production, not curd.

5. **Conclusion**: Based on the information, the correct answer to the question is Lactobacillus acidophilus, as it is the primary bacterium used in the preparation of Indian curd.

**Final Answer**: Indian curd is prepared by inoculating milk with **Lactobacillus acidophilus**.

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