This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal infections, Subject name: Anatomy
[{'content': 'Average time interval between radiation exposure and genesis of post radiation Osteosarcoma \nSelect and explain. \nA. 2 yrs, B. 4 yrs, C. 8 yrs, D. 16 yrs', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Post radiation OGS usually arises after 12-16years Refer post radiation Osteosarcoma', 'role': 'assistant'}]