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: Social & Preventive Medicine
[{'content': 'Papilledema is caused by \nSelect and explain. \nA. Vitamin D intoxication, B. Vitamin A intoxication, C. Vitamin E intoxication, D. Vitamin B intoxication', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]