This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Medicine
[{'content': 'One of the following conditions is not associated with clubbing. \nSelect and explain. \nA. Primary biliary cirrhosis, B. Chronic bronchitis, C. Cryptogenic fibrosing alveolitis, D. Central bronchiectasis', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' chronic bronchitis", 'role': 'assistant'}]