Which acid is present in curd?

Options

A. Citric acid
B. Formic acid
C. Lactic acid
D. Oxelic acid

Explanation

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks which acid is present in curd.

2. **List the Options**: The options given are:
- A) Satric acid
- B) Formic acid
- C) Lactic acid
- D) Oxalic acid

3. **Analyze Each Option**:
- **Satric Acid**: This acid is found in sour fruits like oranges and lemons, but it is not related to curd.
- **Formic Acid**: This acid is found in the sting of ants and bees, not in curd.
- **Lactic Acid**: This acid is produced during the fermentation of milk, which is the process that turns milk into curd.
- **Oxalic Acid**: This acid is found in various vegetables and fruits but is not associated with curd.

4. **Determine the Correct Answer**: Since lactic acid is produced from milk during the fermentation process to make curd, the correct answer is **C) Lactic acid**.

5. **Conclusion**: The acid present in curd is lactic acid.

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