The body is devoid of scales and paired fins in

Options

A. Cyclostomata
B. Chondrichthyes
C. Osteichthyes
D. All the above

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the type of organism that lacks scales and paired fins. This indicates we are looking for a specific group of fish or aquatic animals.

2. **Identifying Fish Classes**: In the animal kingdom, particularly in the class of fish, there are several classifications. The two main classes of fish are:
- **Chondrichthyes**: These are cartilaginous fish, such as sharks and rays, which have scales (placoid scales) and paired fins.
- **Osteichthyes**: These are bony fish, which also have scales (cycloid or ctenoid scales) and paired fins.

3. **Examining the Group Agnatha**: The group that does not fit into the above categories is called **Agnatha**, which includes jawless fish. The most notable class within this group is **Cyclostomata**.

4. **Characteristics of Cyclostomata**: Cyclostomata includes organisms like lampreys and hagfish. These organisms are characterized by:
- The absence of jaws.
- The absence of paired fins.
- The absence of true scales.

5. **Conclusion**: Based on the characteristics discussed, the correct answer to the question is **Cyclostomata**, as this class of organisms is devoid of scales and paired fins.

**Final Answer**: The body is devoid of scales and paired fins in **Cyclostomata**.

---