Depression is certifiably not a hereditary illness and along these lines there is no pertinence of quality move for this situation. Hence alternative A, B and D gets precluded. Be that as it may, flouride in a restricted sum is exceptionally valuable for evacuating the depressions. Flouride in the foood and water enters the circulation system and make the teeth solid from inside. While the Flouride in Saliva make the teeths more grounded and depression free from outside. It diminishes reminization that causes the loss of minerals.
The correct answer would be Fluoride was not used to help protect teeth then
Cavity is not a genetic disease and thus there is no relevance of gene transfer in this case. Thus option A, B and D gets ruled out.
However, flouride in a limited amount is very useful for removing the cavities. Flouride in the foood and water enters the blood stream and make the teeth strong from inside. While the Flouride in Saliva make the teeths stronger and cavity free from outside. It reduces reminization that causes the loss of minerals.
Thus lack of flouride makes the teeth more cavity prone.
