A homogeneous mixture among the following is

Options

A. milk
B. muddy water
C. smoke
D. air

Explanation

To determine which of the given options is a homogeneous mixture, we need to understand the definitions of homogeneous and heterogeneous mixtures.

### Step-by-Step Solution:

1. **Define Homogeneous Mixture**: A homogeneous mixture is one that has a uniform composition throughout. This means that the different components are evenly distributed and cannot be easily distinguished from one another.

2. **Define Heterogeneous Mixture**: A heterogeneous mixture, on the other hand, has a non-uniform composition. The different components can be easily identified and separated, as they are not evenly distributed.

3. **Evaluate the Options**:
- **Option 1: Milk**: Milk is a colloidal mixture where fat globules are dispersed in water. The fat does not uniformly mix with water, making it a heterogeneous mixture.
- **Option 2: Muddy Water**: In muddy water, mud particles settle at the bottom, indicating a non-uniform distribution. Thus, it is also a heterogeneous mixture.
- **Option 3: Smoke**: Smoke consists of solid particles dispersed in a gas. The solid particles are not uniformly distributed, which makes smoke a heterogeneous mixture.
- **Option 4: Air**: Air is a mixture of different gases (like oxygen, nitrogen, carbon dioxide) that are uniformly mixed together. Therefore, air is a homogeneous mixture.

4. **Conclusion**: Among the options provided, the only homogeneous mixture is **Option 4: Air**.

### Final Answer:
The homogeneous mixture among the following is **Air**.

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