1. Tardigrade
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  3. Chemistry
  4. When fluoride ion concentration in water is more than 2 ppm then it causes I. tooth decay. II. brown mottling of teeth. III. harmful effect to bone. Choose the correct statement.

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Q. When fluoride ion concentration in water is more than $2$ ppm then it causes
I. tooth decay.
II. brown mottling of teeth.
III. harmful effect to bone.
Choose the correct statement.

Environmental Chemistry

Solution:

Correct answer is (c) I, II and III