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Question

Fluoride deficiency in drinking water causes diseases. This deficiency is caused by _________ .

A
water pollution
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B
air pollution
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C
land pollution
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D
all of the above
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Solution

The correct option is B water pollution
For drinking purposes, water should be tested for fluoride ion concentration.Its deficiency in drinking water is harmful to man and causes diseases such as tooth decay etc.
Due to water pollution, fluoride content is decreased in water.

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