Optimum level of fluoride in drinking water per liter is Optimum level of fluoride in drinking water per liter is  mcq  given below:


Q. Optimum level of fluoride in drinking water per liter is

(a) 1-2 mg
(b) 0.05-0.08 mg
(c) 0.7-1.2 mg/L
(d) 0.5-0.8 rl

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