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 caused by mutation in: \nSelect and explain. \nA. ATP7A, B. ATP7B, C. HFE, D. HAMP", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Wilson disease is an autosomal recessive disorder caused by mutation of the ATP7B gene, resulting in impaired copper excretion into bile and a failure to incorporate copper into ceruloplasmin. Ref: Robbins 8th edition Chapter 18.', 'role': 'assistant'}]