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': 'The cause of death in cyanide poisoning is - \nSelect and explain. \nA. Anoxic anoxia, B. Anaemic anoxia, C. Histotoxic anoxia, D. Stagnant anoxia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]