This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Peripheral Nerve Injuries, Subject name: Orthopaedics
Erbs palsy involves injury to - 
Select and explain. 
A. C5, 6 roots, B. C6, 7 roots, C. C7, 8 roots, D. C8, T1 roots
A: C5, 6 roots
Answer: A: C5, 6 roots 
Explanation: Ans. is 'a' i.e., C5, 6 roots * Erb's paralysis - C5C6.* Klumpke's paralysis - C8T1