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': 'Which of the following is used in Brachytherapy: \nSelect and explain. \nA. Rd, B. Id -125, C. Ir, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Brachytherapy:\xa0 Rd, Id – 125, Cs, Ir, Au used.\nP-32, Strontium -89, Samarium-153, (NOT iridium -192) are used in systemic radionucluide\nP-32 emits B-rays', 'role': 'assistant'}]