This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Flow Volume curve, Spirometry and DLCO, Subject name: Medicine
[{'content': 'All of these pulmonary changes are seen in restrictive lung disease except: \nSelect and explain. \nA. |FEV1/FVC, B. |TLC, C. |RV, D. | VC', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Vital capacity is sum of ERV + TV + IRV. All these lung volumes are Reduced in Restrictive lung disease due to pulmonary fibrosis. Do not mix with Timed vital capacity which is a ratio of FEV1/ FVC and is increased in restrictive lung disease.', 'role': 'assistant'}]