MCQOPTIONS
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| 1. |
Which one of the following is a factor of air pollution? |
| A. | (a) Vehicles |
| B. | (b) Industries |
| C. | (c) Plants |
| D. | (d) Both (A) and (B) |
| E. | (e) None of these |
| Answer» E. (e) None of these | |