The maximum permissible limit of fluoride in drinking water as per WHO guidelines is:
A3.0 mg/L
B0.5 mg/L
C1.5 mg/L
D5.0 mg/L
Explanation
According to World Health Organization (WHO) drinking water guidelines, maximum desirable fluoride concentration is 1.0 mg/L and maximum permissible upper limit is 1.5 mg/L to prevent dental and skeletal fluorosis.
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