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NBDHE Diagnostic Mock — Question 1 of 20
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NBDHE · DIAGNOSTIC · GUEST
Question
01
/ 20
00:00
End attempt
community health research · MEDIUM
Report · R
☆
Mark · M
Which one of the following is the recommended US water fluoride level?
A
0.7 mg/L fluoride
B
0.4 mg/L fluoride
C
2.0 mg/L fluoride
D
1.2 mg/L fluoride
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