Flagellated protozoans are-

Options

A. Free living
B. Parasites
C. Either free living or parasites
D. Pseudopodia

Answer

### Step-by-Step Solution:

1. **Understanding Flagellated Protozoans**:
- Flagellated protozoans are a type of protozoan characterized by the presence of flagella, which are whip-like structures that aid in movement.

2. **Classification of Protozoans**:
- Protozoans belong to the kingdom Protista. This kingdom includes various types of single-celled organisms, including flagellated protozoans.

3. **Types of Flagellated Protozoans**:
- Flagellated protozoans can be classified into two categories: free-living organisms and parasitic organisms.
- Free-living flagellates thrive independently in their environment, while parasitic flagellates depend on a host for survival.

4. **Examples of Flagellated Protozoans**:
- An example of a parasitic flagellated protozoan is Trypanosoma, which is responsible for causing sleeping sickness in humans.

5. **Correct Answer Selection**:
- Based on the classification and characteristics of flagellated protozoans, the correct answer to the question is that they can be either free-living or parasitic.

### Final Answer:
Flagellated protozoans are either free-living or parasitic.

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