Hello Harsh,
The answer to your question is
[3Ca 3 (PO 4 ) 2 .CaF 2 ].
the question is of coordinate chemistry.
For more information and detailed explanation, kindly refer the below mentioned article:
https://learn.careers360.com/engineering/question-can-someone-help-me-with-this-the-recommended-concentration-of-fluoride-ion-in-drinking-water-is-up-to-1-ppm-as-fluoride-ion-is-required-to-maketeeth-enamel-harder-by-converting-3ca3po42caoh2-to/ Hope this Helps
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