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 technetium is most commonly used in bone pathology? \nSelect and explain. \nA. 99m Tc MDP, B. 99mTc Sestamibi, C. 99m Tc Exametazime, D. 99m Tc Pyrophosphate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Technetium (99mTc) medronic acid is a pharmaceutical product used in nuclear medicine to localize hone metastases as well as other diseases that can alter the normal osteogenesis in bone. 99mTc-medronate\n\nAka 99mTc-methylene diphosphonate, or 99mTc-MDP\nFDA approved imaging agent to investigate extra-skeletal osteogenesis (Metastasis)', 'role': 'assistant'}]