This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Shoulder and arm injuries, Subject name: Orthopaedics
[{'content': 'Most common muscle damaged in rotator cuff \nSelect and explain. \nA. Supraspinatus muscle, B. Infraspinatus muscle, C. Subscapularis muscle, D. Teres minor muscle', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The tendons of the rotator cuff, not the muscle are most commonly involved and of the four the supraspinatus is affected most frequently as it passes below the acromian/ Refer maheswari 9th ed', 'role': 'assistant'}]