Dinosaurs were present during the

Options

A. Palaeozoic era
B. Coenozoic era
C. Mesozoic era
D. Precambrian era.

Answer

To answer the question "Dinosaurs were present during the," we will analyze the given options step by step.

### Step 1: Understand the Options
The options provided are:
1. Paleozoic era
2. Cenozoic era
3. Mesozoic era
4. Pre-Cambrian era

### Step 2: Analyze Each Era
- **Paleozoic Era**: This era is known for the evolution of various life forms, including arthropods and early amphibians. Dinosaurs did not exist during this time. Therefore, this option is incorrect.

- **Cenozoic Era**: This era is often referred to as the "Age of Mammals." Dinosaurs had already become extinct by the beginning of this era. Thus, this option is also incorrect.

- **Mesozoic Era**: This is the correct answer. The Mesozoic Era is known as the "Age of Reptiles," and it is during this time that dinosaurs thrived. The Mesozoic Era is further divided into three periods:
1. Triassic Period
2. Jurassic Period (often called the age of dinosaurs)
3. Cretaceous Period

- **Pre-Cambrian Era**: This era predates the Cambrian period and is characterized by the emergence of simple life forms, such as protozoa. Dinosaurs did not exist during this era either. Hence, this option is incorrect.

### Step 3: Conclusion
Based on the analysis, the correct answer to the question "Dinosaurs were present during the" is the **Mesozoic Era**.

### Final Answer
Dinosaurs were present during the **Mesozoic Era**.

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