Assertion:Avicennia has pneumatophores.
Reason:Pneumatophores help the plant to get oxygen for respiration.

Options

A. a) If both assertion and reason are true and reason is the correct explanation of assertion.
B. b) If both assertion and reason are true but reason is not the correct explanation of assertion.
C. c) If assertion is true but reason is false.
D. d) If assertion and reason are false.

Explanation

To analyze the assertion and reason provided in the question, we can break it down into clear steps:

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "Avicennia has pneumatophores."
- **Explanation**: Avicennia is a genus of mangrove plants that are adapted to grow in marshy or swampy areas. These plants have specialized roots that emerge above the soil.

**Hint**: Consider the environment where Avicennia grows and how it affects root structure.

2. **Understanding the Reason**: The reason states that "Pneumatophores help the plant to get oxygen for respiration."
- **Explanation**: Pneumatophores are specialized aerial roots that extend above the waterlogged soil. They facilitate gas exchange, allowing the plant to absorb oxygen from the atmosphere for respiration.

**Hint**: Think about why plants in swampy areas might need specialized adaptations for gas exchange.

3. **Connecting Assertion and Reason**: Both the assertion and reason are true. Avicennia does have pneumatophores, and these structures do help the plant obtain oxygen for respiration.
- **Explanation**: The pneumatophores are indeed respiratory roots that allow Avicennia to survive in anoxic (low oxygen) conditions typically found in swampy environments.

**Hint**: Reflect on how the function of pneumatophores directly relates to the survival of Avicennia in its habitat.

4. **Determining the Relationship**: The reason provided is a correct explanation of the assertion.
- **Explanation**: The assertion about Avicennia having pneumatophores is supported by the reason that these structures are essential for oxygen uptake, thus validating the assertion.

**Hint**: Consider if the reason could stand alone without the assertion, and how they are interlinked.

5. **Conclusion**: Since both the assertion and reason are true, and the reason correctly explains the assertion, the correct option is that both are true and the reason is the correct explanation for the assertion.

**Hint**: Review the options given in the question to confirm which one matches your conclusion.

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