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: Pediatrics
[{'content': 'IQ between 50–70 indicates – \nSelect and explain. \nA. Mild mental retardation, B. Moderate retardation, C. Severe retardation, D. Profound retardation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]