Physics · Environmental Engineering
The optimum fluoride concentration in drinking water in India recommended by health authorities to prevent dental caries while avoiding fluorosis is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11 - 2 ppm
- 23 - 5 ppm
- 30.5 - 1 ppm✓
- 40.1 - 0.2 ppm
Correct answer
0.5 - 1 ppm
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