A few statements about centrifugation method are given
I. The mixture containing very small suspended particles is rotated at a high speed in a centrifuge machine. II. The denser particles stay at the top. III. The method is used to separate water from wet clothes in a washing machine. IV. The method can be used in laboratories for separating plasma and platelets.
The correct statements are

Options

A. I and IV only
B. I, II and Ill only
C. II, III and IV only
D. I, III and IV only

Explanation

To determine the correct statements about the centrifugation method, let's analyze each statement step by step:

### Step-by-Step Solution:

1. **Understanding Centrifugation**:
- Centrifugation is a method used to separate components of a mixture based on their densities by spinning them at high speeds.

2. **Analyzing Statement I**:
- **Statement**: "The mixture containing very small suspended particles is rotated at a high speed in a centrifuge machine."
- **Evaluation**: This statement is correct. Centrifugation involves spinning mixtures to separate particles based on density.

3. **Analyzing Statement II**:
- **Statement**: "The denser particles stay at the top."
- **Evaluation**: This statement is incorrect. In centrifugation, denser particles move to the bottom of the container, not the top.

4. **Analyzing Statement III**:
- **Statement**: "The method is used to separate water from wet clothes in a washing machine."
- **Evaluation**: This statement is correct. Washing machines use centrifugation to extract water from wet clothes.

5. **Analyzing Statement IV**:
- **Statement**: "The method can be used in laboratories for separating plasma and platelets."
- **Evaluation**: This statement is correct. Centrifugation is commonly used in laboratories to separate blood components like plasma and platelets.

### Conclusion:
- The correct statements are:
- Statement I: Correct
- Statement II: Incorrect
- Statement III: Correct
- Statement IV: Correct

Thus, the correct statements are I, III, and IV.

### Final Answer:
The correct statements are **I, III, and IV**.