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The recommended concentration of fluorid...

The recommended concentration of fluoride ion in drinking water is up to 1 ppm as fluoride ion is required to make teeth enamel harder by converting `[3Ca_(3)(PO_(4))_(2).Ca(OH)_(2)]`

A

`[3Ca_(3)(PO_(4))_(2).CaF_(2)]`

B

`[3(Ca_(3)(OH)_(2).CaF_(2)]`

C

`[CaF_(2)]`

D

`[3(CaF_(2)).Ca(OH)_(2)]`

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If concentration of fluoride ion is upto 1ppm, then which of the following options may be correct:

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