This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Which of the following is most common fixative used in electron microscope \nSelect and explain. \nA. Glutaraldehyde, B. Formalin, C. Picric acid, D. Absolute alcohol', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref,Ackerman 9/e p27 Commenest fixative used for light microscope examination 10%buffered neutral formalin Commenest fixative used for electron microscope examination.Glutaraldehyde', 'role': 'assistant'}]