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': 'BAL is useful in treating poisoning due to all except? \nSelect and explain. \nA. Lead, B. Organic mercury, C. Cadmium, D. Arsenic', 'role': 'user'}, {'content': 'Answer: C \nExplanation: BAL (dimercaprol) is contraindicatcd in iron and cadmium poisoning. \n\xa0It is used in lead (as adjuvant), mercury and arsenic poisoning.', 'role': 'assistant'}]