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': 'Congenital Pseudoarthrosis is \nSelect and explain. \nA. More commonly seen in femur, B. Associated with Neuro fibromatosis, C. Complication of osteomyelitis, D. True joint', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]