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': 'A Patient with history of shoness of breath has, Decreased FEVI/FVC Ratio, Normal DECO. A 200 ml increase in baseline FEV1 is observed 15 minutes after administration of bronchodilators. The likely diagnosis is: \nSelect and explain. \nA. Asthma, B. Chronic Bronchitis, C. Emphysema, D. Interstitial Lung Disease', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer is A (Asthma) An obstructive pattern of PFTs with reduction in the ratio of FEV1; FVC along with demonstration of reversibility of airway obstruction (> 200 ml increase in baseline FEV1) after bronchodilator administration is typical of Asthma.', 'role': 'assistant'}]