The ozone layer in the upper part of the atmosphere protects us from -

The correct answer is Option (4) → Ultraviolet Rays

The ozone layer lies in the stratosphere, about 15-35 km above the Earth. Ozone (\(\ce{O3}\)) molecules absorb most of the Sun’s harmful ultraviolet (UV-B and UV-C) radiation, which would otherwise cause skin cancer, cataracts and damage to crops and sea life. Chlorofluorocarbons (CFCs) thin this layer, which is why the Montreal Protocol (1987) phased them out.