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': 'Anemic hypoxia is seen CMC (Vellore) 14 \nSelect and explain. \nA. CO poisoning, B. CO2 poisoning, C. HCN poisoning, D. Nerve gas', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. CO poisoning', 'role': 'assistant'}]