This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Pathology
Fixative used for bone histopathology is?- 
Select and explain. 
A. 10% formalin, B. Normal saline, C. Rectified spirit, D. Nothing
A: 10% formalin
Answer: A: 10% formalin 
Explanation: The most commonly used fixative in histology is formaldehyde. It is usually used as a 10% neutral buffered formalin (NBF)