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
Inverse supinator jerk is 
Select and explain. 
A. C5, C6, B. C6, C7, C. L5, Si, D. La, Si
A: C5, C6
Answer: A: C5, C6 
Explanation: A i.e. C5, C6