Endoparasitic protistan protozoans belongs to

Options

A. Sporozoa
B. Ciliata
C. Sarcodine
D. Mastigophora.

Answer

To determine which group endoparasitic protistan protozoans belong to, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the classification of endoparasitic protistan protozoans. We need to identify the correct group from the given options.

2. **Reviewing the Options**: The options provided are:
- Sporozoa
- Ciliata
- Sarcodina
- Mastigophora

3. **Analyzing Each Option**:
- **Sporozoa**: This group consists of protozoans that are primarily endoparasitic. They lack locomotory organs and contractile vacuoles, and they depend on their host for nutrition and reproduction. An example is Plasmodium, which causes malaria.
- **Ciliata**: This group includes organisms that use cilia for movement. They are not exclusively parasitic and do not fit the description of endoparasitic protozoans.
- **Sarcodina**: This group includes protozoans that move using pseudopodia. While some can be parasitic, many are free-living, so they do not exclusively represent endoparasitic protozoans.
- **Mastigophora**: This group consists of protozoans that have flagella for movement. Similar to the others, they are not exclusively parasitic.

4. **Identifying the Correct Answer**: Based on the analysis, the only group that consists entirely of endoparasitic protozoans is **Sporozoa**.

5. **Conclusion**: Therefore, the correct answer to the question is **Sporozoa**.

### Final Answer:
**Endoparasitic protistan protozoans belong to Sporozoa.**

---