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: Orthopaedics
[{'content': 'Every 3 degree abduction of arm at shoulder region, the scapular rotation accounts to \nSelect and explain. \nA. 1 degree, B. 2 degrees, C. 3 degrees, D. 0.5 degrees', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]