This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System, Subject name: Physiology
[{'content': 'Arterial O2 content is reduced in one of the following \nSelect and explain. \nA. Stagnant hypoxia, B. Anemic hypoxia, C. Histotoxic hypoxia, D. Ischemic hypoxia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Anemic hypoxia(Ref: Ganong, 25th ed/p.646)Characterized by reduction in hemoglobin concentration and decline in the O2 -carrying capacity of the blood (reduced arterial O2 content)Anemic hypoxia is seen in Carbon monoxide poisoning and methemoglobinemia', 'role': 'assistant'}]