This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Radiology Q Bank, Subject name: Radiology
[{'content': 'Radioisotope(s) preferred for management of bone metastasis is/are? \nSelect and explain. \nA. I-131, B. Iridium 192, C. Sr-89, D. Co-60', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Sr-89 Radioisotope,a beta Emitter used in the palliation of painful Bone metastasis It is metabolised similar to calcium and targets the metabolically active regions of the bone It has a half life of 50.5 Days', 'role': 'assistant'}]