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': 'Putti Platt operation is done for \nSelect and explain. \nA. Elbow instability, B. Shoulder instability, C. Rotator cuff tear, D. Biceps Tendinitis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Putti-Platt operation is done for preventing recurrent shoulder dislocation. Double breasting of subscapularis tendon is performed in order to prevent external rotation and abduction, thereby preventing recurrences. Other operations are Bankas operation, Bristows operation. Ref: Essential Ohopaedics, Maheswari & Mhaskar, 9th ed', 'role': 'assistant'}]