This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Interstitial Lung Disease, Subject name: Medicine
[{'content': 'Curve A signifies which of the following? \nSelect and explain. \nA. Pulmonary fibrosis, B. Atelectasis, C. Emphysema, D. ARDS', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Curve A - increased in Emphysema Curve B - normal Curve C--> decreased in pulmonary fibrosis', 'role': 'assistant'}]