(i) Anabaena lives symbiotically with Azolla.
(ii) Azotobacter is a free-living `N_(2)` fixer in the soil.
Which of the statements given above is/are correct?

Options

A. (i) Only
B. (ii) Only
C. Both (i) and (ii)
D. Neither (i) or (ii)

Answer

To determine the correctness of the statements regarding Anabaena and Azotobacter, we can analyze each statement step by step.

### Step 1: Analyze the first statement
**Statement (i): Anabaena lives symbiotically with Azolla.**

- **Understanding Anabaena**: Anabaena is a genus of cyanobacteria, which are photosynthetic bacteria capable of fixing atmospheric nitrogen.
- **Understanding Azolla**: Azolla is a genus of aquatic ferns that has a symbiotic relationship with Anabaena.
- **Symbiotic Relationship**: In this relationship, Anabaena provides nitrogen in a usable form (nitrate) to Azolla, while Azolla offers a habitat and nutrients to Anabaena.

**Conclusion for Statement (i)**: This statement is correct.

### Step 2: Analyze the second statement
**Statement (ii): Azotobacter is a free-living N₂ fixer in the soil.**

- **Understanding Azotobacter**: Azotobacter is a genus of free-living nitrogen-fixing bacteria found in the soil.
- **Function**: It converts atmospheric nitrogen (N₂) into ammonia (NH₃), which can be utilized by plants. This process is beneficial for soil fertility and crop growth.

**Conclusion for Statement (ii)**: This statement is also correct.

### Final Conclusion
Both statements are correct. Therefore, the answer to the question is that both statements (i) and (ii) are correct.