Assertion :- In telophase chromosomes that have reached their respective poles, lose their individuality
Reason:- In normal condition (Interphase) genetic material exists in form of chromatin material instead of chromosome.

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

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 "In telophase, chromosomes that have reached their respective poles lose their individuality."
- During telophase, the chromatids (which are the duplicated chromosomes) arrive at the poles of the cell. At this stage, they begin to decondense back into chromatin. This means they no longer appear as distinct chromosomes, hence they lose their individuality.
- **Conclusion**: The assertion is true.

2. **Understanding the Reason**:
- The reason states that "In normal condition (Interphase), genetic material exists in the form of chromatin material instead of chromosome."
- During interphase, the genetic material is indeed in the form of chromatin, which is less condensed and allows for gene expression and DNA replication. This is a normal state for the cell when it is not dividing.
- **Conclusion**: The reason is also true.

3. **Connecting Assertion and Reason**:
- The assertion explains a phenomenon occurring during telophase, while the reason explains the state of genetic material during interphase.
- Although both statements are true, the reason does not directly explain the assertion. The loss of individuality of chromosomes in telophase is due to the physical separation of chromatids and their decondensation, not directly because of the chromatin state in interphase.
- **Conclusion**: The reason is not the correct explanation for the assertion.

4. **Final Evaluation**:
- Since both the assertion and the reason are true, but the reason does not correctly explain the assertion, the correct answer is that both are true, but the reason is not a correct explanation of the assertion.

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

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