Match the items of Column I and Column II.
`{:("Column I","Column II"),("A. Butter ","1. Dispersion of liquid in liquid "),("B. Pumice stone ","2. Dispersion of solid in liquid"),("C. Milk","3. Dispersion of gas in solid"),("D. Paints","4. Dispersion of liquid in solid"):}`

Explanation

To match the items from Column I with those in Column II, we will analyze each item in Column I and determine the correct type of dispersion from Column II.

### Step-by-Step Solution:

1. **Identify Butter:**
- Butter is primarily composed of fats which are emulsified in water. This means that it is a mixture where liquid (fat) is dispersed in a solid (the structure of butter).
- **Match:** A. Butter → 4. Dispersion of liquid in solid.

2. **Identify Pumice Stone:**
- Pumice stone is a volcanic rock that contains gas bubbles trapped within it. This indicates that it is a solid that has gas dispersed within its structure.
- **Match:** B. Pumice stone → 3. Dispersion of gas in solid.

3. **Identify Milk:**
- Milk is an emulsion where fat droplets are dispersed in water, making it a classic example of liquid dispersed in another liquid.
- **Match:** C. Milk → 1. Dispersion of liquid in liquid.

4. **Identify Paints:**
- Paints are typically mixtures where solid pigments are dispersed in a liquid medium (like water or oil). This indicates that solids are dispersed in liquids.
- **Match:** D. Paints → 2. Dispersion of solid in liquid.

### Final Matches:
- A. Butter → 4. Dispersion of liquid in solid
- B. Pumice stone → 3. Dispersion of gas in solid
- C. Milk → 1. Dispersion of liquid in liquid
- D. Paints → 2. Dispersion of solid in liquid