Assertion : The rainbow is an example of the dispersion of sunlight by the water drops in the atmosphere.
Reason : No reflection or refraction of light is involved in the formation of rainbow.

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 and reason is not the correct explanation of assertion.
C. If assertion is true but 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 rainbow is an example of the dispersion of sunlight by the water drops in the atmosphere."
- This statement is true. A rainbow is indeed formed when sunlight passes through water droplets in the atmosphere, leading to the dispersion of light into its constituent colors.

2. **Understanding the Reason**:
- The reason states that "No reflection or refraction of light is involved in the formation of rainbow."
- This statement is false. The formation of a rainbow involves not only dispersion but also refraction and internal reflection of light within the water droplets.

3. **Analyzing the Process of Rainbow Formation**:
- When sunlight enters a water droplet, it undergoes refraction (bending of light as it enters a different medium).
- Inside the droplet, the light reflects off the inner surface (internal reflection).
- As the light exits the droplet, it undergoes refraction again, which leads to the dispersion of light into different colors.

4. **Conclusion**:
- The assertion is true because it correctly identifies the rainbow as a result of dispersion.
- The reason is false because it incorrectly states that no reflection or refraction is involved in the formation of a rainbow.

5. **Final Answer**:
- The assertion is true, but the reason is false. Therefore, the correct answer is that the assertion is true and the reason is false.