This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Salivary Glands, Subject name: Surgery
[{'content': 'Hot spot on Tc-99 is seen in which parotid tumor? \nSelect and explain. \nA. Adenolymphoma, B. Adenoid cystic carcinoma, C. Acinic cell tumor, D. Adenocarcinoma', 'role': 'user'}, {'content': "Answer: A \nExplanation: Hot spot on Tc-99 is seen in adenolymphoma (also known as Wahin's tumor). Wahin tumor, or papillary cystadenoma lymphomatosum, is the second most common benign parotid tumor . Because of the high mitochondrial content within oncocytes, the oncocyte-rich Wahin tumor and oncocytomas incorporate technetium-99m and appear as hot spots on radionuclide scans.", 'role': 'assistant'}]