This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'At what cervical level spinal cord circumference is maximum? \nSelect and explain. \nA. C4, B. C5, C. C6, D. C7', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Maximum spinal cord circumference is at level c6 BD CHAURASIA S HUMAN ANATOMY Vol1', 'role': 'assistant'}]