Question
Biology Question on Environmental Issues
A dental disease characterised by mottling of teeth is due to the presence of certain chemical element in drinking water. Which of the following is that element?
A
Fluorine
B
Boron
C
Mercury
D
Chlorine
Answer
Fluorine
Explanation
Solution
The correct option is(A): Fluorine.
Excess fluoride in drinking water causes teeth deformity.