The correct option is B Deplete ozone
Ozone depleting substances (ODS) are substances, which react with ozone present in the stratosphere and destroy the same. The major ODS are chlorofluorocarbons (14 percent of total depletion), nitrogen oxides (3 to 5 percent of total depletion), sulphur dioxides, halon, carbon tetrachloride, methane, methyl chloroform etc.