This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
The first ADA approved fluoride toothpaste in the year: 
Select and explain. 
A. 1960, B. 1968, C. 1964, D. 1954
C: 1964
Answer: C: 1964 
Explanation: In 1955, the stannous fluoride dentifrice became the first dentifrice recognized by the Food and Drug Administration (FDA) as an effective tooth decay preventive product. 
The first fluoride dentifrice was accepted by American Dental Association (ADA) in 1964. It is called CREST.

Essentials of preventive and community dentistry
Soben Peter
5th edition
page no. 261