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: Psychiatry
[{'content': "Pavlov's experiment is an example of- \nSelect and explain. \nA. Operant conditioning, B. Classical conditioning, C. Learned helplessness, D. Modeling", 'role': 'user'}, {'content': "Answer: B \nExplanation: Pavlov's experiment is an example of classical conditioning.", 'role': 'assistant'}]