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: Medicine
[{'content': 'Hypoxemia seen in: \nSelect and explain. \nA. Hypoventilation, B. Myasthenia gravis, C. Pulmonary emboli, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer is D (All of the above): The four basic mechanisms of hypoxemia are a decrease in inspired P02 (Decreased Fi02), hypoventilation (as in Myaesthenia gravis), VQ mismatch (as in pulmonary emboli) and shunting.', 'role': 'assistant'}]