Question -
Which gas protects us from ultraviolet rays of the Sun?
Options:
A .  Hydrogen
B .  Nitrogen
C .  Oxygen
D .  Ozone
Answer: Option D : D Ozone is a colourless gas that can be found throughout all layers of our atmosphere.Most ozone is found in the stratosphere, which begins at about 10–16 kilometres above earth’s surface. The ozone layerprotectsus by absorbing potentially harmful ultraviolet (UV) radiation from the sun. The UVrays can cause sunburn and skin cancer.
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