This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Extremity, Subject name: Anatomy
[{'content': 'Winging of the scapula is seen in injury to which nerve? \nSelect and explain. \nA. Long thoracic nerve of Bell, B. Ulnar nerve, C. Lower subscapular nerve, D. Thoracodorsal nerve', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Long thoracic nerve of Bell * Winging of scapula is caused most commonly by serratus anterior palsy. This is typically caused by damage to long thoracic nerve (nerve to serratus anterior).", 'role': 'assistant'}]