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Reported Question / Answer
Q.) The safe limit of Fluorine in drinking water is
1)
0.2 - 0.5 mg/L
2)
0.5 - 0.8 mg/L
3)
0.8 - 1.2 mg/L
4)
1.2 - 2.0 mg/L
5)
NULL
Answer :
2
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