This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pediatric orthopedics, Subject name: Orthopaedics
[{'content': 'Causes of Psedoahrosis is all of the following except - \nSelect and explain. \nA. Idiopathic, B. multiple compound Fractures, C. Osteomyelitis, D. Neurofibromatosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pseudoahrosis is pseudo joints * it can be seen after a fracture - non union of a fracture may be painless if pseudojoint forms between fracture ends. *it can be idiopathic *can be seen in neurofibromatosis *congenital pseudoahrosis of tibia - rare condition , in 50-90% cases neurofibromatosis is present * in established cases - Boyd dual onlay graft is the treatment of choice in patients with street fracture. REF:textbook of ohopedics, John ebnezer, 4th edition ,pg.no.501', 'role': 'assistant'}]