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 the following are true about obstructive lung disease except \nSelect and explain. \nA. Decreased FeV1, B. Decreased MEFR, C. Increased RV, D. Increased diffusion capacity', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Diffusion capacity is decreased in restrivtive lung disease.decreased in expiratory flow rate is a hallmark of obstructive lung disease. Residual volume is increased & FEV1/FVC is decresde Ref Harrison 19th edition pg 1661', 'role': 'assistant'}]