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': 'Incision used in thyroidectomy \nSelect and explain. \nA. Barking incision, B. Collar incision, C. Kocher incision, D. Koebner incision', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]