This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'Decreased O2 carrying capacity and Normal PO2 is a feature of \nSelect and explain. \nA. Anemic hypoxia, B. Histotoxic hypoxia, C. Stagnant hypoxia, D. Hypoxic hypoxia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Subnormal level of haemoglobin causes decreased oxygen - carrying capacity of the blood. This, in turn, initiates compensatory physiologic adaptations such as :Increased release of oxygen from hemoglobin. o Increased blood flow to the tissues.Maintenance of the blood volume; andRedistribution of blood flow to maintain the cerebral blood supplyEventually, however, tissue hypoxia develops causing impaired functions of the affected tissues.', 'role': 'assistant'}]