In which of the following zones of atmosphere ozone layer is present ?

Options

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

Answer

To answer the question regarding the location of the ozone layer in the atmosphere, we can follow these steps:

### Step 1: Understand the Structure of the Atmosphere
The atmosphere is divided into several layers based on altitude. The main layers are:
- Troposphere
- Stratosphere
- Mesosphere
- Thermosphere
- Exosphere

### Step 2: Identify the Ozone Layer
The ozone layer is a region within the atmosphere that contains a high concentration of ozone (O₃) molecules. It plays a crucial role in absorbing the majority of the sun's harmful ultraviolet (UV) radiation.

### Step 3: Locate the Ozone Layer
The ozone layer is primarily found in the **stratosphere**, which is the second layer of the atmosphere, situated above the troposphere and below the mesosphere. The stratosphere extends from about 10 to 50 kilometers above the Earth's surface.

### Step 4: Conclusion
Based on the information gathered, we can conclude that the ozone layer is present in the **stratosphere**.

### Final Answer
The ozone layer is present in the **stratosphere**.

---