A dental disease characterized by mottling of teeth is due to the excess of a certain chemical. Do you know the name of that chemical?
A. Chlorine
B. Sodium
C. Fluorine
D. Boron
Answer:C
A dental disease characterized by mottling of teeth is due to the excess of a certain chemical. Do you know the name of that chemical?
A. Chlorine B. Sodium C. Fluorine D. Boron