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': "Wilson's disease is characterized by ? \nSelect and explain. \nA. Increased serum ceruloplasmin, B. Decreased copper excretion in urine, C. Increased copper in liver, D. Autosomal dominant", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Increased copper in liver Diagnosis of Wilson disease The gold standard for diagnosis is liver biopsy with quantitative copper assay - concentration of copper in a liver biopsy sample > 200 mg/g dry weight. Other tests are ? Serum ceruloplasmin level - low Urine copper excretion - increased KF rings DNA Haplotype analysis.", 'role': 'assistant'}]