A : `G_(2)` -phase pre-mitotic phase.
R : Chromosomes undergo condensation in this phase.

Options

A. IF both Assertion & Reason are true and the reason followed is the correct explanation of the assertion then mark (1).
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion then mark (2).
C. If Assertion is true statement but Reason is false, then mark (3).
D. If both Assertion and Reason are false statement then mark (4).

Answer

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

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that "G2 phase is a pre-mitotic phase."
- The G2 phase is indeed the final stage of interphase in the cell cycle, occurring before mitosis (M phase). During this phase, the cell prepares itself for mitosis by ensuring that all the necessary components are ready for cell division.
- **Conclusion**: The assertion is **true**.

2. **Understanding the Reason (R)**:
- The reason states that "Chromosomes undergo condensation in this phase."
- Chromosome condensation is a process that occurs during the prophase of mitosis, not during the G2 phase. In G2, the chromosomes are still in a less condensed form, and condensation occurs later as the cell enters mitosis.
- **Conclusion**: The reason is **false**.

3. **Combining the Conclusions**:
- Since the assertion is true and the reason is false, we can conclude that the correct relationship is that the assertion is true, but the reason is false.

4. **Final Answer**:
- Based on the evaluation, the correct option is that the assertion is true, and the reason is false.