Assertion: Many hydrophytes lack roots.
Reason: Roots are used for balancing

Options

A. If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
B. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.
C. If Assertion is true but the Reason is false
D. If both Assertion and Reason are false.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that many hydrophytes lack roots. Hydrophytes are plants that are adapted to living in aquatic environments. They can be fully submerged in water or have most of their body underwater.

2. **Identifying Hydrophytes**: There are two categories of hydrophytes:
- Fully submerged plants (e.g., Hydrilla, Vallisneria).
- Plants that have most of their body submerged (e.g., Trapa, Lotus).

3. **Evaluating the Assertion**: The assertion that many hydrophytes lack roots is true. This is because many aquatic plants do not require roots for anchorage as they are buoyant in water.

4. **Understanding the Reason**: The reason states that roots are used for balancing. While it is true that roots can provide stability and anchorage to plants, this is not the primary reason why hydrophytes lack roots.

5. **Analyzing the Relationship**: The reason provided does not correctly explain the assertion. The lack of roots in hydrophytes is more related to their adaptation to an aquatic environment rather than solely for balancing purposes.

6. **Conclusion**:
- The assertion is true: Many hydrophytes do lack roots.
- The reason is true, but it does not serve as a correct explanation for the assertion.

7. **Selecting the Correct Option**: Based on the analysis:
- Both the assertion and reason are true, but the reason is not the correct explanation for the assertion. Therefore, the correct answer is option B.