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': 'Clubbing is not seen in \nSelect and explain. \nA. Bronchiectasis, B. Hydropneumothorax, C. ILD, D. COPD', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Clubbing not seen in COPD.', 'role': 'assistant'}]