Which among the following is not a homogeneous mixture ?

Options

A. solder
B. aqueous solution of `NaCl`
C. sulphur in carbon disuphide
D. suphur in water

Explanation

To determine which among the given options is not a homogeneous mixture, we will analyze each option step by step.

### Step 1: Understand the concept of homogeneous and heterogeneous mixtures
- **Homogeneous Mixture**: A mixture that has a uniform composition throughout. The components are evenly distributed and cannot be distinguished from one another.
- **Heterogeneous Mixture**: A mixture that does not have a uniform composition. The components can be easily distinguished and separated.

### Step 2: Analyze each option

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