The presence of soluble fluoride ion upto

eSaral Updated on:
Question:

The presence of soluble fluoride ion upto $1 \mathrm{ppm}$ concentration in drinking water, is :

  1. harmful to bones

  2. harmful for teeth

  3. safe for teeth

  4. harmful to skin

Correct Option: , 3

Solution:

(3) safe for teeth

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