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: Surgery
[{'content': 'Charlie Chaplin gait is a feature of: \nSelect and explain. \nA. Congenital coxa vara, B. Tibial torsion, C. Genu valgus, D. CDH', 'role': 'user'}, {'content': "Answer: B \nExplanation: Charlie Chaplin gait is seen in bilateral external torsion of tibia, caused by faulty sitting or sleeping, as in prolonged maintenance of 'spread-eagle' or frogleg position. Management includes early change sleep position, brace management, or late osteotomy.", 'role': 'assistant'}]