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| Q. |
The flouride content in the drinking water should not exceed |
| A. | 200 mg/litre |
| B. | 150 mg/litre |
| C. | 100 mg/litre50 mg/litre |
| D. | 1 mg/litre |
| E. | 50 mg/litre |
| Answer» D. 1 mg/litre | |
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