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': 'A patient comes with non-productive cough, hemoptysis and grade III clubbing, Chest X-ray shows upper left zone lesion. The likely cause is - \nSelect and explain. \nA. Small cell carcinoma lung, B. Non-small cell carcinoma lung, C. Tuberculosis, D. Fungal infection of lung', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]