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: Radiology
[{'content': 'What dose of radiation therapy is recommended for pain relief in bone metastases – \nSelect and explain. \nA. 8 Gy in one fraction, B. 20 Gy in 5 fractions, C. 30 Gy in 10 fractions, D. Above 70 Gy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Radiation therapy is used for painful bone metastasis.\nThe radiation can be given as:-\n\nSingle fraction:- 8 Gy in one fraction.\nMultifraction regimen:- 20 Gy in 5 fractions or 30 Gy in 6 fractions.\n\n"The greater convenience and lower cost make 8 Gy single fraction the treatment of choice for the majority of patients". _\xa0Bone metastasis: experimental & therapeutic', 'role': 'assistant'}]