An example of flagellate protozoan is

Options

A. Paramoecium
B. Trypanosoma
C. Entamoeba
D. Plasmodium

Answer

To determine an example of a flagellate protozoan, we will analyze the options provided and identify which organism fits the criteria of being a flagellate.

### Step-by-Step Solution:

1. **Understand the Characteristics of Protozoans**:
- Protozoans are unicellular organisms that belong to the kingdom Protista.
- They are eukaryotic, meaning they have a defined nucleus and organelles.

2. **Identify the Types of Movement in Protozoans**:
- Protozoans can move using different structures:
- Cilia: Short hair-like structures that help in movement (e.g., Paramecium).
- Flagella: Long whip-like structures used for propulsion (e.g., Trypanosoma).
- Pseudopodia: Temporary projections of the cell used for movement (e.g., Amoeba).

3. **Evaluate the Options**:
- **Parametrium**: This organism moves using cilia, so it is not a flagellate protozoan.
- **Trypanosoma**: This organism uses flagella for movement, making it a flagellate protozoan.
- **Entamoeba**: This organism moves using pseudopodia, so it is not a flagellate protozoan.
- **Plasmodium**: This organism does not have cilia or flagella and moves by gliding, so it is not a flagellate protozoan.

4. **Conclusion**:
- The only organism from the options that qualifies as a flagellate protozoan is **Trypanosoma**.

### Final Answer:
An example of a flagellate protozoan is **Trypanosoma**.