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: Forensic Medicine
[{'content': 'Phassy jaw is caused by \nSelect and explain. \nA. Yellow phosphorus, B. White phosphorus, C. Cadmium, D. Lead', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Phossy Jaw is produced by chronic white phosphorus poisoning.', 'role': 'assistant'}]