This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pediatric Ohopedics, Subject name: Orthopaedics
[{'content': "A 4-month-child diagnosed with DDH, cast used after closed reduction is: \nSelect and explain. \nA. Hip spica, B. Pavlik harness, C. Minnerva cast, D. Riser's cast", 'role': 'user'}, {'content': "Answer: B \nExplanation: Treatment Plan of DDH A. Neonate and Young Child (1-6 month)--Closed reduction. B. Pavlik harness after hip reduces is treatment of choice C. Ilfeld - craig splint, Von-Rosen splint and Freika pillow can also be used. OTHER OPTIONS: Minerva cast- cervical spine disease Reiser's cast- scoliosis", 'role': 'assistant'}]