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: Anatomy
[{'content': 'Isthmus of thyroid gland lies at which level? \nSelect and explain. \nA. C2, B. C4, C. C5, D. C7', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Isthmus of thyroid gland lies at C7 level', 'role': 'assistant'}]