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
Erb's point is: 
Select and explain. 
A. C4, C5, B. C5, C6, C. C6, C7, D. C7, C8, T1
B: C5, C6
Answer: B: C5, C6 
Explanation: C5, C6