This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Orthopaedics
Secondary osteosarcoma is associated with 
Select and explain. 
A. Paget's disease, B. Osteogenesis imperfect, C. Melhoreostosis, D. Anklyosing spondylitis
A: Paget's disease
Answer: A: Paget's disease 
Explanation: Causes of secondary osteosarcomaPaget&;s DiseaseFibrous dysplasiaRadiationEnchondromatosisHereditary multiple exostosesChronic osteomyelitisBone infarction (Refer: Manish Kumar Varshney's Essential Ohopedics Principles & Practice, 1st edition, pg no. 191, 192)