This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Organic mental disorders, Subject name: Psychiatry
[{'content': 'Patient with IQ of 60 has \nSelect and explain. \nA. Severe MR, B. Profound MR, C. Moderate MR, D. Mild MR', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Mental Retardation Level IQ Range 1. Mild 50-70* 2. Moderate 35-50* 3. Severe 20-35* 4. Profound <20* Reference: A Sho Textbook of Psychiatry by Niraj Ahuja page no.156.', 'role': 'assistant'}]