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': "'Sindoor' used by ladies is: September 2004 \nSelect and explain. \nA. Lead acetate, B. Lead tetroxide, C. Lead chromate, D. Lead carbonate", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B i.e. Lead tetroxide', 'role': 'assistant'}]