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 level of 45 is called: September 2005 \nSelect and explain. \nA. Mild mental retardation, B. Moderate mental retardation, C. Severe mental retardation, D. Profound mental retardation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B i.e. Moderate mental retardation', 'role': 'assistant'}]