This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Obstructive Lung Disease, Subject name: Pathology
Bronchus is the site of pathological changes for all of the following diseases, except: 
Select and explain. 
A. Chronic bronchitis, B. Asthma, C. Bronchiectasis, D. Emphysema
D: Emphysema
Answer: D: Emphysema 
Explanation: Emphysema occurs at the site of acinus, the anatomical site for the rest of them is the bronchus.