Assertion:- A single human cell has approximately two meter long thread of DNA distributed in each chromosome.
Reason:- Durring different stages of cell division cells show organised nucleus in place 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 analyze the given assertion and reason, we will break down each part step by step.

### Step 1: Evaluate the Assertion
The assertion states that a single human cell has approximately a two-meter long thread of DNA distributed in each chromosome.

- **Explanation**: This is true. Each human cell contains about 2 meters of DNA, which is tightly coiled and packaged into chromosomes. Humans have 46 chromosomes in total, which means that this long DNA is organized into these structures to fit within the cell nucleus.

### Step 2: Evaluate the Reason
The reason states that during different stages of cell division, cells show an organized nucleus in place of chromosomes.

- **Explanation**: This statement is false. During cell division, particularly in the prophase stage, the nuclear envelope breaks down, and the chromatin condenses into visible chromosomes. The organized nucleus does not exist in the form of chromosomes during this phase. The nucleus reappears in the telophase stage after the chromosomes have been separated.

### Step 3: Conclusion
Based on the evaluations:
- The assertion is true.
- The reason is false.

Thus, the correct conclusion is that the assertion is true, but the reason is false.

### Final Answer
- Assertion: True
- Reason: False