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: Pathology
[{'content': "Reye's syndrome is diagnosed by using _______ stain - \nSelect and explain. \nA. Reticulin stain, B. Oil-red-O stain, C. PAS stain, D. Mustein stain", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Read following 2 facts :-\n\n"Oil red O stain is used to stain fat".\n"Characteristic histopathologic change in the cells in Rey\'s syndrome is fat accumulation. Glycogen is completely\xa0absent from the cells".\n\nThese changes are seen in the cells of liver, brain & kidneys. So after combining these 2 facts, you can easily get the answer.\nNow something more about stains', 'role': 'assistant'}]