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Which of the following statements are correct regarding Ozone gas?
1. Ozone naturally occurs in the upper layers of the atmosphere.
2. It shields the earth from the harmful ultraviolet rays of the sun.
3. At the ground level however, it is a pollutant with highly toxic effects.
Select the correct option from the codes given below:
Options:
A .  Only 1 & 2
B .  Only 2 & 3
C .  Only 1 & 3
D .  1, 2 & 3
Answer: Option D
OZONE NATURALLY OCCURS IN THE UPPER LAYERS OF THE ATMOSPHERE. IT SHIELDS THE EARTH FROM THE HARMFUL ULTRAVIOLET RAYS OF THE SUN. AT THE GROUND LEVEL HOWEVER, IT IS A POLLUTANT WITH HIGHLY TOXIC EFFECTS.

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