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: Surgery
[{'content': 'Which of the following is not done for diagnosis of parotid tumor \nSelect and explain. \nA. MRI, B. CT, C. Open surgical biopsy, D. FNAC', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Open surgical biopsy is not preferred in parotid tumors.', 'role': 'assistant'}]