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': 'Most common lung cancers in non smokers is \nSelect and explain. \nA. Squamous cell carcinoma, B. Bronchoalveolar carcinoma, C. Small cell carcinoma, D. Adenocarcinoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Adenocarcinoma\xa0is the most common lung cancers in non smokers.', 'role': 'assistant'}]