Question

Ozone layer protects the earth from ____________.

• A. X-rays
• B. Infra-red rays
• C. Cosmic rays
• D. Ultra-violet rays

Answer 1

The correct option is D Ultra-violet rays

• The ozone layer blocks the harmful ultra-violet rays coming from the sun and prevents it from reaching the earth's surface thus play an extremely important role. However it cannot block x-rays, infrared rays or cosmic rays. Hence option D is correct.
• The ozone layer is found in the lower stratosphere