- A Troposphere (lowest atmosphere)
- B Stratosphere (15-35 km altitude)
- C Mesosphere
- D Exosphere
Correct answer: B. Stratosphere (15-35 km altitude)
Explanation: The ozone layer is in the stratosphere, primarily 15-35 km above Earth's surface. It absorbs 97-99% of harmful UV-B and UV-C radiation from the sun. Ozone hole forms over Antarctica each spring due to CFC-mediated destruction.
Concept context
Pollution, global warming, ozone depletion, deforestation, and sustainability. Important for NEET and general awareness.