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: Pathology
[{'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 hypeension", 'role': 'user'}, {'content': "Answer: B \nExplanation: DLCO decreases in conditions that thicken or destroy alveolar membrane (Interstitial lung disease, Emphysema) and cuail the pulmonary vasculature (pulmonary hypeension).DLCO is elevated in acute congestive cardiac failure, asthma, and pulmonary hemorrhage. Goodpasture's syndrome is characterized by pulmonary hemorrhage and renal involvement. Ref: Harrisons principles of internal medicine, 18th edition, Page: 2092", 'role': 'assistant'}]