Assertion : Lymphocyte cells of connective tissue proper are called as cart wheel cells.
Reason : Lymphocyte cell is largest cell of connective tissue proper.

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 Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are false.

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "Lymphocyte cells of connective tissue proper are called as cart wheel cells." We need to evaluate the accuracy of this statement.

2. **Evaluating the Assertion**: Lymphocytes are a type of white blood cell found in the lymphatic system and are indeed a part of connective tissue. However, they are not referred to as "cart wheel cells." This term is not associated with lymphocytes. Therefore, the assertion is **false**.

3. **Understanding the Reason**: The reason states that "Lymphocyte cell is the largest cell of connective tissue proper." We need to assess this statement as well.

4. **Evaluating the Reason**: Lymphocytes are actually among the smallest cells in connective tissue. They are not the largest; in fact, they are relatively small compared to other cells in connective tissue proper. Hence, this reason is also **false**.

5. **Conclusion**: Since both the assertion and the reason are false, we can conclude that the correct answer is that both statements are false.

6. **Selecting the Correct Option**: Based on our evaluation, we find that option D, which states that "both assertion and reason are false," is the correct choice.

### Final Answer:
**Option D: Both assertion and reason are false.**

---