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Punjab Police Department Papers - 2020 :: Discussion
| 19. | The thinning of Ozone layer is resulting due to chlorofluorocarbons, which are used in ? | |
| A. | Electric heaters and washing machines | |
| B. | Spray cans and refrigerators | |
| C. | Cigarettes� lighters and air conditions | |
| D. | None of these | |
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