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
Clubbing is not seen in 
Select and explain. 
A. Bronchiectasis, B. Hydropneumothorax, C. ILD, D. COPD
D: COPD
Answer: D: COPD 
Explanation: Clubbing not seen in COPD.