A. Ozone depleting potential of class-I substances are far more than class II
B. Ozone depleting potential of class II substances are far more than class I
C. All chlorofluoro carbons belong to class II ozone depleting substances
D. HCFC-21 belongs to class II ozone depleting substance
E. Class-I contains fully halogenated gases
Choose the correct answer from the options given below: