Casaual organisms of sleeping sickness and kala-azar belong to which of thefollowing groups of protozoan protists?

Options

A. Amoeboid protozoans
B. Flagellated protozoans
C. Ciliated protozoans
D. Sporozoans

Explanation

To solve the question regarding the causal organisms of sleeping sickness and kala-azar, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Diseases**:
- Sleeping sickness is also known as African Trypanosomiasis.
- Kala-azar is a form of Leishmaniasis.

2. **Identify the Causal Organisms**:
- The organism responsible for sleeping sickness is *Trypanosoma brucei*.
- The organism responsible for kala-azar is *Leishmania donovani*.

3. **Classify the Organisms**:
- *Trypanosoma brucei* is a flagellated protozoan, as it has flagella for movement.
- *Leishmania donovani* is also classified as a flagellated protozoan.

4. **Determine the Group of Protozoan Protists**:
- Both causal organisms belong to the group known as flagellated protozoans.

5. **Select the Correct Option**:
- Given the options: amoeboid protozoans, flagellated protozoans, ciliated protozoans, and sporozoans, the correct answer is flagellated protozoans.

### Final Answer:
The causal organisms of sleeping sickness and kala-azar belong to the group of **flagellated protozoans**.

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