Assertion : Blood glands are present in earthworm
Reason : Earthworm has an open type of blood vascular system.

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 but reason is false
D. If both assertion and reason are false

Explanation

To solve the question regarding the assertion and reason about blood glands in earthworms, we can break it down step by step:

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Blood glands are present in earthworm."
- This is true. Earthworms do have blood glands, which are located in segments 4, 5, and 6. These glands are responsible for producing blood cells and hemoglobin.

2. **Understanding the Reason**:
- The reason states that "Earthworm has an open type of blood vascular system."
- This is false. Earthworms actually have a closed type of blood vascular system. In a closed system, the blood is contained within vessels, which is the case for earthworms.

3. **Evaluating the Relationship**:
- The assertion is true, but the reason provided is false. The reason does not correctly explain the assertion since the type of blood vascular system does not affect the presence of blood glands.

4. **Conclusion**:
- Based on the evaluation, the correct answer is that the assertion is true, but the reason is false.

### Final Answer:
- The assertion is true, and the reason is false.