Which of the following plants is used for the purification of water ?

Options

A. Beggiation
B. Chlorella
C. Spirogyra
D. Eichhornia

Answer

To solve the question "Which of the following plants is used for the purification of water?", we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Options**: The question provides four options:
- A) Vegetation
- B) Chlorella
- C) Spirogyra
- D) Icornia

2. **Evaluate Option A (Vegetation)**:
- **Analysis**: The term "vegetation" is a general term that refers to plant life in a particular area. It is not a specific plant species.
- **Conclusion**: This option is incorrect as it does not refer to a specific plant used for water purification.

3. **Evaluate Option B (Chlorella)**:
- **Analysis**: Chlorella is a type of green algae known for its ability to photosynthesize and provide nutrients. However, it is not specifically recognized for its role in water purification.
- **Conclusion**: This option is incorrect as Chlorella does not purify water.

4. **Evaluate Option C (Spirogyra)**:
- **Analysis**: Spirogyra is also a green filamentous algae. It is known for its bioactive properties, such as antiviral and antioxidant effects, but it is not used for water purification.
- **Conclusion**: This option is incorrect as Spirogyra does not purify water.

5. **Evaluate Option D (Icornia)**:
- **Analysis**: Icornia, commonly known as water hyacinth, is an aquatic flowering plant. It is known for its ability to treat domestic wastewater and is used in water purification processes.
- **Conclusion**: This option is correct as Icornia is used for the purification of water.

### Final Answer:
The plant used for the purification of water is **Icornia** (water hyacinth).

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