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': "According to Freud's theory, age group of the phallic stage is: \nSelect and explain. \nA. 1-2 yrs., B. 2-3 yrs., C. 3-5 yrs., D. 7-10 yrs.", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]