This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Dislocation of Shoulder, Subject name: Orthopaedics
[{'content': 'Recurrent dislocation are common in : \nSelect and explain. \nA. Shoulder, B. Patella, C. Hip joint, D. Elbow joint', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' shoulder [Ref. Maheshwari, 3/e, p76 (2/e, p75)Commonest joint in the human body to dislocate- shoulder*Commonest joint in body to undergo recurrent dislocation- shoulder*Commonest type of shoulder dislocation- Anterior*", 'role': 'assistant'}]