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
Caries tetrad was given by: 
Select and explain. 
A. Keyes, B. Newbrun, C. Hyatt, D. Bowen
B: Newbrun
Answer: B: Newbrun 
Explanation: Caries triad was given by Keyes and caries tetrad was given by Newbrun.