This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
[{'content': 'The fixative used in histopathology ? \nSelect and explain. \nA. 10% buffered neutral formalin, B. Bouins fixative, C. Glutaraldehyde, D. Ethyl alcohol', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' 10% buffered neutral formalin", 'role': 'assistant'}]