This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Social Science, Mental Health & Genetics, Subject name: Social & Preventive Medicine
[{'content': 'Mental retardation is defined if IQ is below - \nSelect and explain. \nA. 90, B. 80, C. 70, D. 60', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., 70 * A child with IQ < 70 is called mentally retarded.* The WHO classification of mental retardation is based on the concept of IQ and includes the following categories:CategoryIQMild50-70Moderate35-49Severe20-34Profound<20* A child with IQ < 70 is called mentally retarded.", 'role': 'assistant'}]