Ozone layer absorbs these radiations of sun 

C) Vegetation cover does not receive sun rays a lot

B) Stratosphere

B) It protects living organisms from ultraviolet – B radiation from the Sun.

C) Chlorofluoro carbons

B) Montreal protocol

C) Compounds of flourine and chlorine

(D) X-rays and ultraviolet rays.

Ozone layer is being destroyed by Chlorine

(b) Stratosphere