Butter is separated from milk by the technique

Options

A. sedimentation
B. centrifugation
C. distillation
D. fractional distillation

Explanation

To answer the question "Butter is separated from milk by the technique," we will analyze the options provided and determine the correct method used for this separation.

### Step-by-Step Solution:

1. **Understanding the Options**: We have four options to choose from:
- A) Sedimentation
- B) Centrifugation
- C) Distillation
- D) Fractional Distillation

2. **Analyzing Sedimentation**: Sedimentation is a process where particles settle down due to gravity. While it can be used to separate components, it is not the most effective method for separating butter from milk, as the butterfat does not settle quickly enough.

3. **Analyzing Distillation and Fractional Distillation**: Both distillation and fractional distillation are techniques used to separate liquids based on their boiling points. These methods are not applicable for separating butter from milk, as they involve heating and vaporization, which is not relevant in this context.

4. **Analyzing Centrifugation**: Centrifugation involves spinning a mixture at high speeds to create a force that separates components based on their density. In the case of milk, when it is centrifuged, the heavier components settle at the bottom, while the lighter butterfat rises to the top, allowing for easy separation.

5. **Conclusion**: After analyzing all options, the correct technique for separating butter from milk is **Centrifugation**.

### Final Answer:
The technique used to separate butter from milk is **Centrifugation** (Option B).

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