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
[{'content': 'The oral drive theory to explain thumb sucking habit was given by \nSelect and explain. \nA. Benjamin, B. Sears and wise, C. Sigmund freud, D. Scheldon', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]