Spirogyra is found in

Options

A. Running fresh water
B. Stagnant salt water
C. Stagnant fresh water
D. None of the above.

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question asks about Spirogyra, which is a type of green algae.

2. **Classification**: Spirogyra belongs to the division Chlorophyta, which includes green algae.

3. **Habitat**: Spirogyra is known to thrive in aquatic environments.

4. **Type of Water**: It is important to determine whether Spirogyra is found in fresh or salt water.

5. **Observation of Characteristics**: Spirogyra is characterized by its filamentous structure and spiral arrangement of chloroplasts.

6. **Common Environment**: Spirogyra is typically found in freshwater bodies.

7. **Specific Conditions**: It is often found in stagnant freshwater, such as ponds and slow-moving streams.

8. **Conclusion**: Based on the information, the correct answer is that Spirogyra is found in stagnant freshwater.

**Final Answer**: Stagnant freshwater (Option 3).

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