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
[{'content': 'Fixative used for bone histopathology is?- \nSelect and explain. \nA. 10% formalin, B. Normal saline, C. Rectified spirit, D. Nothing', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The most commonly used fixative in histology is formaldehyde. It is usually used as a 10% neutral buffered formalin (NBF)', 'role': 'assistant'}]