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
Bronchiectasis is most common in which lobe: 
Select and explain. 
A. Right upper lobe, B. Right middle lobe, C. Left upper lobe, D. Left lower lobe
D: Left lower lobe
Answer: D: Left lower lobe 
Explanation: Answer is D (Left lower lobe): "Bronchiectasis is commonly affects lower lobe bronchi, the left side being affected more frequently than right" - API 7th Right middle lobe and lingual are next in frequency of involvement.