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Question

The ozone layer in earth's atmosphere is crucial for human survival because it

A
Has ions
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B
Reflects radio signals
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C
Reflects ultraviolet rays
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D
Reflects infrared rays
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Solution

The correct option is D Reflects ultraviolet rays
An ozone layer, present in the stratosphere, reflects the ultraviolet rays emitted by the sun and thus it prevents us from skin diseases and mutation.
So, the correct answer is option C.

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