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: Anatomy
[{'content': 'All are decreased in infiltrative lung disease except \nSelect and explain. \nA. Vital capacity, B. Alveolar aerial difference in PaO2, C. Total lung capacity, D. Lung compliance', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In infiltrative lung disease the alveolar capillary bed is damaged and there is a decrease in diffusion capacity.this results in an increase in alveolar aerial differences in PaO2 Ref Harrison 19th edition pg 1710', 'role': 'assistant'}]