Assertion : The nest of Dischidia is a modified structure of root .
Reason : Nest roots absorb water and food from humusrich soil collected in nest.

Options

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

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that the nest of Dischidia is a modified structure of the root. Dischidia is known to be an epiphytic plant, which means it grows on other plants. In this context, the "nest" refers to the specialized structures that help the plant survive in its environment.

**Hint**: Think about what modifications plants make to adapt to their environments, especially in epiphytes.

2. **Analyzing the Reason**: The reason given is that nest roots absorb water and food from humus-rich soil collected in the nest. This implies that the roots of Dischidia not only serve as anchors but also play a role in nutrient absorption.

**Hint**: Consider how epiphytic plants obtain nutrients and water since they do not grow in traditional soil.

3. **Connecting Assertion and Reason**: Both the assertion and reason are true. The nest structure of Dischidia is indeed a modified root structure that helps in collecting water and nutrients. The roots are adapted to absorb moisture and nutrients from the organic material that collects in the nest.

**Hint**: Reflect on how the adaptations of plants can serve multiple functions, such as support and nutrient absorption.

4. **Conclusion**: Since both the assertion and reason are true, and the reason correctly explains the assertion, we conclude that the correct answer is that both statements are true, and the reason is the correct explanation for the assertion.

**Hint**: When evaluating assertions and reasons, always check if the reason logically supports the assertion.

### Final Answer:
Both the assertion and reason are true, and the reason is the correct explanation of the assertion.