This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Forensic Toxicology - Concepts, Statutes, Evidence, and Techniques, Subject name: Forensic Medicine
[{'content': 'Mechanism of cyanide poisoning is by inhibiting - \nSelect and explain. \nA. DNA synthesis, B. Cytochrome oxidase, C. Protein breakdown, D. Protein synthesis', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Cytochrome oxidase o Cyanide inhibits cytochrome oxidase for oxygen utilisation in cells,o Death is due to cytotoxic/ histotoxic anoxia,o It is associated with a characteristic smell of bitter almonds.", 'role': 'assistant'}]