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': "The diffusion capacity of lung (DLCO) is decreased in all of the following conditions except - \nSelect and explain. \nA. Interstitial lung disease, B. Goodpasture's syndrome, C. Emphysema, D. Primary pulmonary hypertension", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]