A container is filled with water at `4^@C`. The water will overflow if the temperature of water is :

Options

A. Increased
B. Decreased
C. Increased or decreased
D. None of them

Explanation

To solve the question, "A container is filled with water at 4°C. The water will overflow if the temperature of water is:", we will analyze the relationship between temperature, density, and volume of water.

### Step-by-Step Solution:

1. **Understand the Properties of Water at 4°C**:
- Water has its maximum density at 4°C. This means that at this temperature, water occupies the least volume for a given mass.

2. **Effect of Temperature on Density**:
- When the temperature of water increases above 4°C, its density decreases. This is because water expands when heated.
- Conversely, when the temperature decreases below 4°C, the density also decreases due to the same expansion effect.

3. **Relationship Between Density and Volume**:
- Density is defined as mass per unit volume (Density = Mass/Volume). If the mass of water remains constant (which it does in this case), a decrease in density must result in an increase in volume.

4. **Determine Conditions for Overflow**:
- The container will overflow if the volume of water increases. Since we established that increasing or decreasing the temperature from 4°C leads to a decrease in density, this will cause the volume of water to increase.

5. **Conclusion**:
- Therefore, the water will overflow if the temperature is either increased or decreased from 4°C.

### Final Answer:
The water will overflow if the temperature of water is increased or decreased from 4°C.