Which of the following is the uppermost region of the atmosphere ?

Options

A. Stratosphere
B. Troposphere
C. Exosphere
D. ionosphere

Answer

To determine the uppermost region of the atmosphere, we can follow these steps:

### Step 1: Understand the Layers of the Atmosphere
The atmosphere is divided into several layers, each with distinct characteristics. The main layers, starting from the Earth's surface, are:
1. Troposphere
2. Stratosphere
3. Mesosphere
4. Thermosphere
5. Exosphere

### Step 2: Identify the Order of the Layers
- **Troposphere**: This is the lowest layer where weather occurs.
- **Stratosphere**: Above the troposphere, it contains the ozone layer.
- **Mesosphere**: This layer is above the stratosphere.
- **Thermosphere**: This layer is above the mesosphere, where temperatures increase significantly.
- **Exosphere**: This is the outermost layer of the atmosphere, where the atmosphere transitions into outer space.

### Step 3: Determine the Uppermost Layer
From the list of layers, the **Exosphere** is the uppermost region of the atmosphere. It is located above the thermosphere and extends into space.

### Conclusion
The uppermost region of the atmosphere is the **Exosphere**.

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