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': 'What will the estimated Pa02 after giving Fi02 at 0.5 in a normal person? \nSelect and explain. \nA. > 50 mmHg, B. > 100 mmHg, C. > 150 mmHg, D. > 200 mmHg', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer- D. > 200 mmHgln normal person, the measured PA O2 should equal to 5 x FiO2 . For example, a patient breathing 40% O (FiO2 of 0.4) should have a PaO2 5 x 40 = 200 mmHg. A PA O2 less than 4 to 5 times the FiO2 suggest poor lung function or hypoventilation.', 'role': 'assistant'}]