This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bronchiectasis, Subject name: Medicine
[{'content': 'Bronchiectasis is most common in which lobe? \nSelect and explain. \nA. Right upper lobe, B. Right middle lobe, C. Left upper lobe, D. Left lower lobe', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Bronchiectatic lesions are most commonly found in the lower lobes, probably because mucociliary clearance is facilitated by gravity in the upper lobes. The bronchiectatic lesions were identified most commonly in the left lower lobe, followed by the right lower lobe and left upper lobe. The most common organisms :- Haemophilus influenza (15%), Staphylococcus aureus (13%), Streptococcus pneumonia (5%), Pseudomonas aeruginosa (5%) and Mycoplasma pneumonia (5%)', 'role': 'assistant'}]