Moderate
Presence of a certain minimum quantity of fluorine is desirable in potable water to prevent___________________?
Correct answer: A. Dental cavities
- A. Dental cavities
- B. Scale formation
- C. Water-borne disease
- D. Corrosion
Explanation
Fluoride at a controlled low concentration strengthens developing tooth enamel and reduces dental cavities. Excess fluoride, however, can cause fluorosis, so the question refers to a minimum desirable amount.
Written and checked by Zahid Hussain, MS Computer ScienceLast updated
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