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: Surgery
[{'content': "Secondary osteosarcoma are associated with \nSelect and explain. \nA. Paget's disease, B. Osteogenesis imperfecta, C. Melhoreostosis, D. Ankylosing spondilitis", 'role': 'user'}, {'content': "Answer: A \nExplanation: Answer- A. Paget's diseaseCauses of secondary osteosarcomaPagets DiseaseFibrous dysplasiaEnchondromatosisHereditary multiple exostosisRadiationChronicosteomyelitisBone infarction", 'role': 'assistant'}]