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 Imbecile according to weehsler Intelligence scale \nSelect and explain. \nA. 25 - 49, B. 50 - 69, C. 70 - 79, D. 90 - 109', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]