This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Limb Traumatology, Subject name: Orthopaedics
[{'content': "Most common affected tendon in the Swimmer's shoulder? \nSelect and explain. \nA. Infraspinatus, B. Supraspinatus, C. Teres minor, D. Teres major", 'role': 'user'}, {'content': "Answer: B \nExplanation: Swimmer's shoulder /supraspinatus syndrome/ Painful arc syndrome/Shoulder impingement syndrome. Causes of swimmer's shoulder: Supraspinatus tendinitis - Most common cause Complete or paial rupture of the rotator cuff Osteoahritis of the acromioclavicular joint", 'role': 'assistant'}]