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': 'Which of the following is not a complication of radical neck dissection ? \nSelect and explain. \nA. Carotid blow out, B. Frey’s syndrome, C. Shoulder dysfunction, D. Phernic nerve injury', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Frey’s syndrome is a complication of parotid surgery.', 'role': 'assistant'}]