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: Dental
[{'content': 'Trainable mentally retarded child fall under which IQ category ? \nSelect and explain. \nA. 40, B. 30, C. 32, D. 20', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]