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. Posterior primary rami of C6-C7, B. Anterior primary rami of C5-C6, C. Posterior primary rami of Cs-T1, D. Posterior primary rami of C2-C8", 'role': 'user'}, {'content': 'Answer: B \nExplanation: B. i.e. Anterior primary rami of C5- C6', 'role': 'assistant'}]