This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Wilson Disease, Subject name: Medicine
[{'content': "A 15 year old child presents with falling school grades and development of abnormal posture. On examination dystonia and increase muscle tone is noted. Slit lamp examination shows presence of KF ring. Liver biopsy for copper will be stained by which of the following stain? \nSelect and explain. \nA. Perl stain, B. Rubeanic acid, C. Supravital stain, D. Schmorl's method", 'role': 'user'}, {'content': "Answer: B \nExplanation: Rubeanic acid and Rhodamine stains are utilized to detect the cytoplasmic accumulation of copper in the liver. Schmorl's method is used for detecting melanin and uses the reducing propeies of melanin to stain granules blue-green. It is also used to detect lipofuscin.", 'role': 'assistant'}]