This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Carbohydrate Metabolism, Subject name: Pediatrics
[{'content': 'In Wilson disease, which of the following is seen? \nSelect and explain. \nA. Low ceruloplasmin, high urine copper, B. Low ceruloplasmin, low urine copper, C. High ceruloplasmin, high urine copper, D. High ceruloplasmin, low urine copper', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Investigations in Wilson disease: serum ceruloplasmin - Decreased Urinary copper excretion (Normal <40 mg/day) is increased to >100 mg/day Serum free copper level may be elevated in early Wilson disease Hepatic copper content >250mg/g of dry liver weight Slit lamp examination: Kayser Fleischer Ring', 'role': 'assistant'}]