This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
[{'content': 'FEV1 / FEVC ratio is decreased in all, except \nSelect and explain. \nA. Bronchiectasis, B. Emphysema, C. Chronic bronchitis, D. Tuberculosis', 'role': 'user'}, {'content': "Answer: D \nExplanation: ParameterObstructive lung diseaseRestrictive lung diseaseTotal lung capacityNormal to increaseDecreaseResidual volumeIncreaseDecreaseVital capacityDecreaseDecreaseFEV1/ FVC (FEV1%)DecreaseNormal to increaseFEF 25-75% (Forced expiratory flow rate)Decrease NormalDiffusion capacityNormal (| in emphysema)DecreasedRefer: Harrison's Principles of Internal Medicine, 18th edition, pg no: 2163-2165", 'role': 'assistant'}]