This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Medicine
[{'content': 'FEVI/FVC Is decreased in? \nSelect and explain. \nA. Ashtma, B. Kyphosis, C. Scoliosis, D. Fibrosis', 'role': 'user'}, {'content': "Answer: A \nExplanation: Obstructive diseases like asthma is characterised by increased lung volumes like TLC,FRC and. RV,and reduced expiratory volumes like FEV1,FVC,FEV1/FVC ratio.Restrictive diseases like kyphoscoliosis and fibrosis are characterised by lowered lung volumes like TLC,FRC,and RV,as well as FVC & FEV1.But the expiratory volumes are relatively elevated when considered in relation to lung volumes,thereby normal or increased FEV1/FVC ratio. Reference:Harrison's medicine-18th edition,page no:2083/", 'role': 'assistant'}]