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': 'Wandering acetabulum is seen in \nSelect and explain. \nA. Septic arthritis of Hip, B. TB Hip, C. Transient synovitis of Hip, D. Psoas abscers', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]