The absorption of $U V$ radiation by $O_{3}$ :

protects the inhabitants of our planet from injurious radiation

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maintains an equilibrium between the concentrations of

O_{2}

and

O_{3}

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makes both the function A and B above effective

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makes no function effective

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Solution

The correct option is C makes both the function A and B above effective
We know that UV-B radiation is very harmful.

The UV light will also destroy ozone and break ozone back down into atomic oxygen (O) and diatomic oxygen ( $O_{2}$ ) Therefore, the ozone layer does a great job filtering UV radiation and this process protects the inhabitants of our planet from injuries radiation and adsorption of UV radiation has maintained the equilibrium between the of oxygen and ozone in the atmosphere.

So, A and B are both effective.

C is the correct answer.

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