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': 'Ochronosis is seen in poisoning with: DNB 09; FMGE 11; NEET 13 \nSelect and explain. \nA. HCl, B. Boric acid, C. Oxalic acid, D. Carbolic acid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Carbolic acid', 'role': 'assistant'}]