This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal System, Subject name: Radiology
[{'content': "Differential diagnosis of Nonaccidental injury is all except? \nSelect and explain. \nA. Osteogenesis imperfecta, B. Scurvy, C. Caffey's disease, D. Osteopetrosis", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans DD/D of NAI consists all paediatric diseases where there is mostly normal bone pattern and multiple fractures. Osteopetrosis consists of diffuse increase in sclerosis of all bones and pathological fractures can be easily differentiated from NAI.', 'role': 'assistant'}]