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': 'Inverse supinator jerk is \nSelect and explain. \nA. C5, C6, B. C6, C7, C. L5, Si, D. La, Si', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. C5, C6', 'role': 'assistant'}]