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 dislocations are least commonly seen in- \nSelect and explain. \nA. Ankle, B. Hip, C. Shoulder, D. Patella', 'role': 'user'}, {'content': 'Answer: A \nExplanation: First I would like to differentiate between dislocation and subluxation.\n\nDislocation Vs Subluxation\n\nDislocation is complete separation of articular surfaces of a joint.\nSubluxation is a symptomatic abnormal separation of articular surfaces of a joint without complete separation (dislocation), i.e., symptomatic partial separation.\n\nJoints with recurrent dislocations\n\nShoulder (most common)\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Elbow (rare\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Temporomandibular joint\nPatella (2nd most common)\xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0Hip (rare)\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0 \xa0Sternoclavicular', 'role': 'assistant'}]