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: Pathology
[{'content': 'What is present in the pa of the bone which received radiotherapy- \nSelect and explain. \nA. Response to radiotherapy is good, B. Fast healing, C. More destruction of bone, D. Tumour regression is not affected', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., More destruction of bone o Infection and radiation, both cause bone destruction and predispose to pathological fracture.", 'role': 'assistant'}]