Shark, Torpedo (Electric ray) and Trygon (Sting ray) are cartilaginous fishes and belong to class

Options

A. Cyclostomata
B. Chondrichthyes
C. Osteichthyes
D. Amphibia

Answer

To determine the class to which sharks, torpedoes (electric rays), and trigons (sting rays) belong, we can follow these steps:

1. **Identify the Organisms**: The question mentions three types of cartilaginous fishes: sharks, torpedoes (electric rays), and trigons (sting rays).

2. **Understand Cartilaginous Fishes**: Cartilaginous fishes are characterized by having a skeleton made of cartilage rather than bone. This is a key feature that helps classify them.

3. **Review the Options Provided**: The options given are:
- A) Cyclostomata
- B) Chondrichthyes
- C) Osteichthyes
- D) Amphibia

4. **Analyze Each Option**:
- **Cyclostomata**: This class includes jawless fishes like lampreys and hagfishes, which do not have a cartilaginous skeleton.
- **Chondrichthyes**: This class includes all cartilaginous fishes, such as sharks, rays, and skates. This is the most likely class for the organisms mentioned.
- **Osteichthyes**: This class includes bony fishes, which have a skeleton made of bone, not cartilage.
- **Amphibia**: This class includes amphibians like frogs and salamanders, which are not related to cartilaginous fishes.

5. **Conclusion**: Since sharks, torpedoes, and trigons are all cartilaginous fishes, they belong to the class **Chondrichthyes**.

Thus, the correct answer is **B) Chondrichthyes**.