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: Physiology
[{'content': 'Vital capacity and timed vital capacity is decreased in all except: \nSelect and explain. \nA. Asthma, B. Scoliosis, C. Pneumonia, D. Emphysema', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In scoliosis, vital capacity is decreased but timed vital capacity is normal.', 'role': 'assistant'}]