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
Model diagnostic setup for planning clear aligners was given in 1945 by? 
Select and explain. 
A. Kesling, B. Johnson, C. Angle, D. Ribbs
A: Kesling
Answer: A: Kesling 
Explanation: None