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
Classical conditioning theory was given by: 
Select and explain. 
A. Masler., B. Bandura., C. Pavlov., D. Skinner.
C: Pavlov.
Answer: C: Pavlov. 
Explanation: Classical conditioning theory was given by Pavlov.