Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test Environmental Studies Environment Ozone Depletion
Halons, kinds of Ozone Depletings Substances (ODS), were essentially and widely used in
1
Refrigerators
2
Air conditioners
3
Aerosol spray propellents
4
Fire Extinguishers
5
None of the above