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': 'A patient suffering from purulent sputum, cough and clubbing of fingers is probably suffering from: \nSelect and explain. \nA. Lung abscess with left ventricular failure, B. Bronchiectasis, C. Chronic bronchitis, D. Acute upper respiratory tract infection', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]