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

Options

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

Answer

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

### Step 1: Identify the Layers of the Atmosphere
The atmosphere is divided into several layers based on altitude and temperature. The primary layers are:
- Troposphere
- Stratosphere
- Mesosphere
- Thermosphere
- Exosphere

### Step 2: Understand the Order of the Layers
From the Earth's surface upwards, the order of the layers is as follows:
1. **Troposphere**: This is the lowest layer, where weather occurs. It extends up to about 12 km.
2. **Stratosphere**: Above the troposphere, extending from about 12 km to 45 km. It contains the ozone layer.
3. **Mesosphere**: This layer extends from about 45 km to 85 km.
4. **Thermosphere**: Above the mesosphere, extending from about 85 km to 600 km.
5. **Exosphere**: This is the outermost layer, extending from about 600 km to 10,000 km.

### Step 3: Identify the Uppermost Layer
From the list and the order established, the uppermost layer of the atmosphere is the **Exosphere**.

### Conclusion
Therefore, the answer to the question "Which of the following is the uppermost layer of the atmosphere?" is **Exosphere**.