Assertion: The viscosity of water is less than blood.
Reason : The viscosity of liquids decreases with increases in temperature.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true and reason is false.
D. If both assertion and reason are false.

Explanation

To solve the question, we need to analyze both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "The viscosity of water is less than blood."
- Viscosity is a measure of a fluid's resistance to flow. Water is known to be a less viscous fluid compared to blood. Blood contains cells and proteins, which contribute to its higher viscosity. Therefore, the assertion is **true**.

2. **Understanding the Reason**:
- The reason states that "The viscosity of liquids decreases with increases in temperature."
- This statement is generally true for most liquids. As temperature increases, the kinetic energy of the molecules increases, causing them to move apart and reducing the viscosity. Thus, the reason is also **true**.

3. **Analyzing the Relationship**:
- We need to determine if the reason correctly explains the assertion.
- While both statements are true, the reason does not specifically explain why water has a lower viscosity than blood. The reason applies to all liquids and does not distinguish between the two fluids in question.

4. **Conclusion**:
- Since both the assertion and the reason are true, but the reason does not provide a correct explanation for the assertion, the correct answer is that both are true, but the reason is not the correct explanation of the assertion.

### Final Answer:
- Both assertion and reason are true, but the reason is not the correct explanation of the assertion.

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