Large flying reptiles were

Options

A. Archaeopteryx
B. Pterosaur
C. Apatosaurus
D. Plesiosaur.

Answer

**Step-by-Step Text Solution:**

1. **Identify the Question**: The question asks about large flying reptiles.

2. **Analyze the Options**:
- **Archaeopteryx**: This is a genus of bird-like dinosaurs, but they are not classified as large flying reptiles.
- **Pterosaur**: This group includes large flying reptiles that lived during the Mesozoic era. They are known for their wings made of a membrane stretched between an elongated fourth finger and their body.
- **Apatosaurus**: This is a genus of herbivorous sauropod dinosaurs, which were large but not flying reptiles.
- **Plesiosaur**: These are marine reptiles known for their long necks and flippers, but they are not flying reptiles.

3. **Determine the Correct Answer**: Based on the analysis, the correct answer is **Pterosaur** as they are the only option that fits the description of large flying reptiles.

4. **Conclusion**: Therefore, the answer to the question "Large flying reptiles were" is **Pterosaur**.

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