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 bronchogenic carcinoma is \nSelect and explain. \nA. Small cell carcinoma, B. Squamous cell carcinoma, C. Mixed cell carcinoma, D. Adenocarcinoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]