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': "Coxa vara, not a true statement \nSelect and explain. \nA. Seen in perthe's disease, B. Seen in Rheumatoid Arthritis, C. Treated with Osteotomy, D. Fairbank's triangle is seen", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]