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': 'Recurrent dislocation of shoulder joint occurs due to \nSelect and explain. \nA. Weakened and ruptured muscle, B. Damaged glenoid labrum, C. Reduced blood supply, D. Injury to rotator cuff', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]