Dinosaurs became extinct in

Options

A. Permian
B. Jurassic
C. Triassic
D. Creataceous

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks when dinosaurs became extinct, providing four options that represent different geological periods.

2. **Identifying the Geological Periods**: The options given are:
- Option 1: Permian
- Option 2: Jurassic
- Option 3: Triassic
- Option 4: Cretaceous

3. **Analyzing Each Option**:
- **Permian**: This period occurred before dinosaurs existed. Therefore, it cannot be the correct answer.
- **Triassic**: This is the first period of the Mesozoic Era when dinosaurs first appeared. However, it does not mark their extinction.
- **Jurassic**: This is the middle period of the Mesozoic Era when dinosaurs thrived, but again, it does not indicate their extinction.
- **Cretaceous**: This is the final period of the Mesozoic Era. It is well-documented that dinosaurs went extinct at the end of this period.

4. **Conclusion**: Based on the analysis, the correct answer is that dinosaurs became extinct in the **Cretaceous Period** (Option 4).