Release of which among the following is the primary reason for depletion of the ozone layer?

Chlorofluorocarbons (CFCs) contribute to

ozone depletion in the upper atmosphere. It is an

organic compound that contains only carbon, chlorine, and fluorine, produced as volatile derivative of

methane, ethane, and propane. Commonly known

by the DuPont brand name Freon, the manufacture of CFCs has been phased out under the Montreal Protocol.