This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Imaging of Interstitial Lung Disease, Subject name: Radiology
[{'content': 'Which of the following pattern is reflected in the flow volume curve? \nSelect and explain. \nA. Obstructive airway disease, B. Restrictive airway disease, C. Mixed pattern airway disease, D. Central hypoventilation syndrome', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Obstructive airway disease.', 'role': 'assistant'}]