This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
[{'content': 'This investigation to visualize parathyroids is done using \nSelect and explain. \nA. 99mTc sestamibi, B. 99mTc peechnetate, C. 99mTc exametazime, D. 99mTc MAG3', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 99mTc sestamibi - Parathyroid imaging99mTc peechnetate - Thyroid, Meckel&;s diveiculum99mTc exametazime - Cerebral blood flow imaging99mTc MAG3 - Renal imaging', 'role': 'assistant'}]