Which of the classes doesn't belong to the same superclass ?

Options

A. Reptilia
B. Aves
C. Osteichthyes
D. Amphibia

Answer

To solve the question of which class does not belong to the same superclass, we need to analyze the given options: Reptilia, Aves, Osteichthyes, and Amphibia.

### Step-by-Step Solution:

1. **Identify the Classes:**
- **Reptilia:** This class includes reptiles such as snakes, lizards, and turtles.
- **Aves:** This class consists of birds.
- **Osteichthyes:** This class includes bony fish.
- **Amphibia:** This class consists of amphibians like frogs and salamanders.

2. **Determine the Superclass:**
- All the classes mentioned (Reptilia, Aves, Amphibia) are part of the superclass **Tetrapoda**. Tetrapoda includes all vertebrates that have limbs.
- **Osteichthyes**, on the other hand, is part of the superclass **Actinopterygii**, which includes fish that have fins and gills, not limbs.

3. **Compare the Classes:**
- **Reptilia, Aves, and Amphibia** all possess limbs and are therefore grouped under the superclass Tetrapoda.
- **Osteichthyes** does not have limbs; instead, it has fins and gills, placing it in a different superclass.

4. **Conclusion:**
- Since Osteichthyes is the only class that does not belong to the superclass Tetrapoda, it is the odd one out.

### Final Answer:
The class that does not belong to the same superclass is **Osteichthyes**.

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