Golden Age of Dinosaurs / Age of reptiles was

Options

A. Mesozoic
B. Cenozoic
C. Palaeozoic
D. Psychozoic

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the period known as the "Golden Age of Dinosaurs" or the "Age of Reptiles." This refers to a specific geological era in which dinosaurs were the dominant terrestrial vertebrates.

2. **Identifying the Options**: The options provided are:
- A) Mesozoic
- B) Cenozoic
- C) Paleozoic
- D) Phanerozoic

3. **Analyzing Each Option**:
- **A) Mesozoic**: This era began approximately 252 million years ago and is known for the dominance of dinosaurs. It is divided into three periods: Triassic, Jurassic, and Cretaceous. This is the correct answer as it is referred to as the "Age of Reptiles."

- **B) Cenozoic**: This era follows the Mesozoic and is known as the "Age of Mammals." It began about 66 million years ago and is not associated with dinosaurs.

- **C) Paleozoic**: This era predates the Mesozoic and is known for the Cambrian explosion and the development of marine life. It does not include dinosaurs.

- **D) Phanerozoic**: This is a broader geological eon that encompasses both the Paleozoic and Mesozoic eras. It is not specific to dinosaurs.

4. **Conclusion**: Based on the analysis, the correct answer is **A) Mesozoic**, as it is the era known as the "Golden Age of Dinosaurs."