Which gas of the atmosphere holds up ultraviolet rays?
Correct option is B. $$O_3$$
The maximum concentration of ozone gas (O$$_{3}$$) is present in the stratosphere region of the earth’s atmosphere. Ozone gas forms a layer in the stratosphere which absorbs the most harmful UV rays also known as UV-C and UV-B. Exposure in UV rays can cause skin cancer, plant tissue damage and other dreadful illness. In the past few years, the ozone layer is depleting rapidly due to excessive use of aerosols, chlorofluorocarbons and other kinds of pollutants. Montreal Protocol in 1987 was signed to control the amount of ozone-depleting substances
So, the correct answer is 'O$$_{3}$$'