MCQOPTIONS
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| 1. |
Green house gases are |
| A. | CO2, CH4, NO and CFC |
| B. | CO2, CH4, SO2 and NO |
| C. | SO2, No, H2S and CO |
| D. | CO, NH3, H2,S and N2 |
| Answer» B. CO2, CH4, SO2 and NO | |