Assertion `:-` Monocytes and lympholcytes are agranulocytes `:`
Reason `:-` Monocytes and lymphocytes have no lobes in their nucleus.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertiion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are False

Answer

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 "Monocytes and lymphocytes are agranulocytes."
- Agranulocytes are a type of white blood cell that do not have visible granules in their cytoplasm when viewed under a microscope. Monocytes and lymphocytes fall into this category.
- Therefore, the assertion is **true**.

2. **Understanding the Reason**:
- The reason states that "Monocytes and lymphocytes have no lobes in their nucleus."
- Monocytes have a kidney-shaped nucleus, while lymphocytes typically have a large, round nucleus. Neither of these cell types has lobed nuclei, which is a characteristic of granulocytes (like neutrophils, eosinophils, and basophils).
- Thus, the reason is also **true**.

3. **Evaluating the Relationship**:
- While both the assertion and the reason are true, we need to determine if the reason correctly explains the assertion.
- The classification of monocytes and lymphocytes as agranulocytes is based on the absence of granules in the cytoplasm, not the shape of the nucleus.
- Therefore, the reason does not adequately explain why monocytes and lymphocytes are classified as agranulocytes.

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

### Final Answer:
The assertion is true, and the reason is true, but the reason is not a correct explanation of the assertion.