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': "Which of the following poisoning gives 'Bitter almond smell'? \nSelect and explain. \nA. Lead, B. Cyanide, C. Mercury, D. Organophosphorus", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Cyanide is having the classic "bitter almond" odor. Cyanide is a chemical asphyxiant; binding to cellular cytochrome oxidase, it blocks the aerobic utilization of oxygen. Unbound cyanide is detoxified by metabolism to thiocyanate, a much less toxic compound that is excreted in the urine. Ref: Blanc P.D. (2012). Chapter 57. Cyanide. In K.R. Olson (Ed), Poisoning & Drug Overdose, 6e.', 'role': 'assistant'}]