This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Postmoem techniques, Subject name: Forensic Medicine
[{'content': 'Preservative used for virological examination in autopsy is \nSelect and explain. \nA. Glycerol, B. Rectified spirit, C. Formalin, D. Thymol', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Preservative used for virological examination in autopsy is Glycerol in buffered saline Preservative used for urine examination in autopsy - thymol formalin used for histopathological examination', 'role': 'assistant'}]