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Q.

Brown mottling of teeth is the consequence when the Fluoride concentration in water is

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a

above 2 ppm

b

below 0.5 ppm

c

between 0.5 ppm - 1 ppm

d

between 1 ppm - 2 ppm

answer is B.

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Detailed Solution

Fluoride concentration in excess of 10 ppm causes brittleness of bones.

Fluoride concentration above 2 ppm causes brown mottling of teeth.

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