This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
A patient has a herniated interveebral disc impinging on the right C5 nerve roots. Which of the following movements would most likely be affected? 
Select and explain. 
A. Extension of the fingers, B. Extension of the shoulder, C. Flexion of the elbow, D. Flexion of the wrist
C: Flexion of the elbow
Answer: C: Flexion of the elbow 
Explanation: C5 helps mediate flexion, abduction, and lateral rotation of the shoulder, and flexion of the elbow. Both C5 and C6 mediate extension of the elbow. Extension of the fingers is mediated by C7 and 8. Extension of the shoulder is mediated by C7 and c8. Flexion of the wrist is mediated by C6 and 7. Ref: Gray&;s anatomy text book of anatomy BD chaurasia 21st Ed.