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: Medicine
[{'content': 'In Asthma patient positive bronchodilator reversibility test is indicated by \nSelect and explain. \nA. Increase in FEV1 > 5% after SABA inhalation, B. Increase in FEV1 > 12% after SABA inhalation, C. Increase in FEV1 > 25% after SABA inhalation, D. Increase in FEV1 > 50% after SABA inhalation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. Increase in FEV1 > 12% after SABA inhalation Bronchial reversibility is defined as SABA induced increase in FEVI > 12% and > 0.20 litres (200 ml)', 'role': 'assistant'}]