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: Surgery
[{'content': 'Winging of scapula is seen in paralysis of which muscle? \nSelect and explain. \nA. Serratus anterior, B. Supraspinatus, C. Pectoralis major, D. Infraspinatus', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Serratus anterior", 'role': 'assistant'}]