A young boy who was driving motorcycle at a high speed collided with the tree and was thrown on his right shoulder.Thought there was no fracture,his right arm was medially rotated and forearm pronated.The following facts concerning this patient

• A. A lesion of C5 and C6 was present
• B. The injury was at Erb's point
• C. Supraspinatus, Infraspintaus, Subclavius and Biceps brachii were paralyzed
• D. The median and ulnar nerves were affected