MCQOPTIONS
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MCQOPTIONS
| 1. |
X ray films are a source of which of the following gas? |
| A. | SO<sub>2</sub> |
| B. | CO<sub>2</sub> |
| C. | NO<sub>2</sub> |
| D. | SO<sub>3</sub> |
| Answer» D. SO<sub>3</sub> | |