This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory Function, Subject name: Medicine
[{'content': 'FEV1/FVC is reduced in case of: \nSelect and explain. \nA. Pleural effusion, B. Lung fibrosis, C. Asthma, D. All of the above', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' Asthma. FEV/FVC is reduced in cases of obstructive lung diseases and remain normal or increase in case of restrictive lung disease.Asthma is an obstructive lung disease so FEV/FVC is reduced in it.", 'role': 'assistant'}]