Assertion: The deficiency of fluoride in drinking water cause disease such as tooth decay etc. Reason: The `F^(-)` ions make the enamel on teeth much harder by converting hydroxyapatite, the enamal on the surface of the teeth, into much harder fluorapatite.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true and the reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true.

Assertion: The deficiency of fluoride in drinking water cause disease

1.	Assertion: The deficiency of fluoride in drinking water cause disease such as tooth decay etc. Reason: The `F^(-)` ions make the enamel on teeth much harder by converting hydroxyapatite, the enamal on the surface of the teeth, into much harder fluorapatite.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true and the reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true.
Answer» Correct Answer - A `[3(Ca_(3)(PO_4)_(2) gt Ca(OH)_(2)] underset(F^(-))(rarr) [3Ca_(3)(PO_4)_(2).CaF_(2)]`

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