

MCQOPTIONS
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1. |
1. Pollution
|
A. | 2, 3, 4, 1 |
B. | 3, 4, 2, 1 |
C. | 2, 1, 4, 3 |
D. | 1, 2, 3, 4 |
Answer» D. 1, 2, 3, 4 | |