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: Surgery
[{'content': 'A 60 year old male was diagnosed as carcinoma right lung. On CECT chest there was a tumor of 5 ✕ 5 cm in upper lobe and another 2 ✕ 2 cm size tumor nodule in middle lobe. The primary modality of treatment is - \nSelect and explain. \nA. Radiotherapy, B. Chemotherapy, C. Surgery, D. Supportive treatment', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]