Which one of the following is the major cause of stratospheric ozone layer degradation?

Which of the following gas is primarily responsible for the depletion of the stratospheric Ozone layer?

The maximum concentration of Ozone gas is found in which atmospheric layer?

Ozone layer, which absorbs the ultra-violet radiation, is found in which one of the following layers of the atmosphere?

Which of the following layers contains the ozone layer?

Which one of the following layers of the atmosphere is responsible for the deflection of radio waves?