Which of the following is acidic in nature?

Options

A. Milk
B. Human blood
C. Lime water
D. Laundary detergents

Explanation

To determine which of the following substances is acidic in nature, we need to evaluate the pH of each option provided. A substance is considered acidic if its pH is less than 7.

### Step-by-Step Solution:

1. **Identify the Substances**: List the substances given in the question. For the sake of this solution, we will assume the options are:
- Milk
- Human Blood
- Lime Water
- Laundry Detergents

2. **Evaluate Milk**:
- Milk is known to contain lactic acid, which is produced by bacteria.
- The presence of lactic acid indicates that milk has a pH less than 7.
- Therefore, milk is acidic in nature.

3. **Evaluate Human Blood**:
- The pH of human blood ranges from 7.35 to 7.45.
- Since this pH is greater than 7, human blood is not acidic.

4. **Evaluate Lime Water**:
- Lime water is a solution of calcium hydroxide (Ca(OH)₂), which is a strong base.
- The pH of lime water is greater than 7, indicating that it is not acidic.

5. **Evaluate Laundry Detergents**:
- Laundry detergents typically have a pH around 10, which is also greater than 7.
- Thus, laundry detergents are not acidic.

6. **Conclusion**:
- Based on the evaluations, the only substance that is acidic in nature is **Milk**.

### Final Answer:
Milk is acidic in nature.