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': 'IQ =20-34 - \nSelect and explain. \nA. Severe MR, B. Profound MR, C. Moderate MR, D. Mild MR', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Severe MR The Intelligence Quotient (I.Q.) is calculated according to the formula:The WHO classification of mental retardation is based on the concept of IQ and includes the following categories:CategoryIQMild50-70Moderate35-49Severe20-34Profound<20A child with IQ <70 is called mentally retarded.", 'role': 'assistant'}]