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': 'Sestamibi Scan is used in \nSelect and explain. \nA. Ectopic thyroid, B. Ectopic parathyroid, C. Parathyroid adenoma, D. Extra adrenal pheochromocytoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Parathyroid gland', 'role': 'assistant'}]