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
[{'content': '"Winging" of the Scapula is due to injury to: \nSelect and explain. \nA. Nerve supplying serratus anterior, B. Pectoral nerve, C. Subscapular nerve, D. Ulnar nerve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Nerve supplying serratus anterior', 'role': 'assistant'}]