Que. | The recommended level of fluoride in drinking water is |
- A. 0.5-0.8 mg/L
- B. 0.8-1.2 mg/L
- C. 0.1-0.5 mg/L
- D. 1.2-2.5 mg/L
Right Answer is :
✓ A. 0.5-0.8 mg/L
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