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 sublingual cancer in a 65 year old tobacco chewer has involved the mandible. The commando surgery has been planned. All of the following in removed in commando operation except \nSelect and explain. \nA. Involved mandible, B. Oral cancer, C. Accessory nerve, D. Neck lymphnodes', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer- C. Accessory nerveCommando operationCommando operation is done for oral cancers which have involvement of mandible', 'role': 'assistant'}]