Unknown Recommended level of fluoride in drinking water- A 0.2-0.5 mg/L B 0.5-0.8 mg/L C 0.8-1.2 mg/L D 1.2-2.0 mg/L 💡 Explanation Recommended level of fluoride in drinking water- ✓ Correct Answer: B. 0.5-0.8 mg/L