The fish-like giant reptile which existed 200 mya was

Options

A. Pteranodon
B. Ichthyosaur
C. Triceratops
D. Tyrannosaurus

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of a fish-like giant reptile that existed around 200 million years ago.

2. **Analyzing the Options**: The options provided are:
- Pteranodon
- Isthyosaur
- Triceratops
- Tyrannosaurus

3. **Identifying Characteristics**:
- **Pteranodon**: This was a flying reptile, not a fish-like marine reptile.
- **Isthyosaur**: This is known to be a marine reptile that resembled fish in body shape and lived during the Mesozoic era.
- **Triceratops**: This was a land-dwelling herbivorous dinosaur, not related to marine life.
- **Tyrannosaurus**: This was a large terrestrial carnivorous dinosaur, also not fish-like.

4. **Selecting the Correct Answer**: Based on the analysis, the only option that fits the description of a fish-like giant reptile is **Isthyosaur**.

5. **Conclusion**: The fish-like giant reptile which existed 200 million years ago is **Isthyosaur**.

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