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
Which of the following is most common fixative used in electron microscope 
Select and explain. 
A. Glutaraldehyde, B. Formalin, C. Picric acid, D. Absolute alcohol
A: Glutaraldehyde
Answer: A: Glutaraldehyde 
Explanation: Ref,Ackerman 9/e p27 Commenest fixative used for light microscope examination 10%buffered neutral formalin Commenest fixative used for electron microscope examination.Glutaraldehyde