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: Social & Preventive Medicine
[{'content': 'IQ Value of 50 - 69 is \nSelect and explain. \nA. Imbecile, B. Moron, C. Normal, D. Idiot', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]