A. Oxygen
B. Chlorofluorocarbon
C. Carbon (ll) oxide
D. Nitrogen (ll) oxide
Correct Answer: Option B
B. Chlorofluorocarbon
A. Oxygen
B. Chlorofluorocarbon
C. Carbon (ll) oxide
D. Nitrogen (ll) oxide
Correct Answer: Option B
B. Chlorofluorocarbon
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