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': 'Learning disability is otherwise called as \nSelect and explain. \nA. Infantile psychosis, B. Minimal brain dysfunction, C. Childhood schizophrenia, D. Attention deficit disorder', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]