Assertion: Cell growth results in disturbing the ratio between the nucleus and cytoplasm.
Reason: Mitosis helps the cell to restore the nucleocytoplasmic ratio:

Options

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

Explanation

To analyze the assertion and reason provided in the question, we will break down the statements and evaluate their validity step by step.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states, "Cell growth results in disturbing the ratio between the nucleus and cytoplasm."
- During cell growth, the cell increases in size, which involves an increase in cytoplasmic volume. However, the nucleus does not increase in size at the same rate. This imbalance leads to a disturbance in the nucleocytoplasmic ratio.

2. **Understanding the Reason**:
- The reason states, "Mitosis helps the cell to restore the nucleocytoplasmic ratio."
- Mitosis is a type of cell division that results in the formation of two daughter cells. During mitosis, the nucleus divides, and each daughter cell receives a nucleus. This process helps to restore the nucleocytoplasmic ratio because both the nucleus and cytoplasm are divided, allowing for a more balanced ratio in the resulting cells.

3. **Evaluating the Truth of the Statements**:
- Both the assertion and the reason are true. The assertion correctly describes how cell growth can disturb the nucleocytoplasmic ratio, and the reason accurately explains that mitosis helps to restore this ratio.

4. **Determining the Relationship**:
- Although both statements are true, the reason does not directly explain the assertion. The assertion discusses the disturbance caused by cell growth, while the reason discusses the restoration of the ratio during mitosis. Therefore, the reason is not a correct explanation of the assertion.

5. **Conclusion**:
- Based on the analysis, we can conclude that the correct answer is that both the assertion and reason are true, but the reason is not the correct explanation of the assertion.

### Final Answer:
The correct answer is Option 2: Both assertion and reason are true, but the reason is not the correct explanation of the assertion.