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Q. |
Lead poisoning occurs when the lead content in water is |
A. | 30 - 50 ppm |
B. | 300 - 500 ppm |
C. | 10 - 15 ppm |
D. | 3 - 5 ppm |
E. | 0.3 - 0.5 ppm |
Answer» E. 0.3 - 0.5 ppm |
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