Which of the following is a ciliated protozoan?

Options

A. Plasmodium vivax
B. Amoeba proteus
C. Paramecium caudatum
D. Leishmanis donovani

Explanation

To solve the question "Which of the following is a ciliated protozoan?", we will analyze the given options step by step.

### Step 1: Identify the Options
The options provided are:
- A) Plasmodium vivax
- B) Amoeba proteus
- C) Paramecium caudatum
- D) Leishmania donovani

### Step 2: Understand the Characteristics of Ciliated Protozoans
Ciliated protozoans are a group of protozoans that have hair-like structures called cilia covering their surface. These cilia are used for movement and feeding.

### Step 3: Analyze Each Option
- **A) Plasmodium vivax**: This is a protozoan that causes malaria. It is not ciliated; it belongs to the group of Apicomplexa.

- **B) Amoeba proteus**: This is a well-known protozoan that moves using pseudopodia (false feet). It is not ciliated.

- **C) Paramecium caudatum**: This is a well-known ciliated protozoan. It has cilia covering its body and is commonly found in freshwater environments.

- **D) Leishmania donovani**: This protozoan is responsible for leishmaniasis and is not ciliated; it belongs to the group of flagellates.

### Step 4: Conclusion
After analyzing all the options, we find that the only ciliated protozoan among the options is **C) Paramecium caudatum**.

### Final Answer
The correct answer is **C) Paramecium caudatum**.

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