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': "Erb's point is: \nSelect and explain. \nA. C4, C5, B. C5, C6, C. C6, C7, D. C7, C8, T1", 'role': 'user'}, {'content': 'Answer: B \nExplanation: C5, C6', 'role': 'assistant'}]