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: Microbiology
[{'content': 'Rabies diagnosis is done best by: \nSelect and explain. \nA. Brain biopsy, B. Blood culture, C. Electron microscopy, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a. Brain biopsy', 'role': 'assistant'}]