This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastrointestinal tract, Subject name: Pharmacology
[{'content': "Drug of choice for Wilson's disease with hepatic compensation? \nSelect and explain. \nA. Zinc, B. Zinc and Trientene, C. Thiomolybdate, D. Pencillamine", 'role': 'user'}, {'content': 'Answer: B \nExplanation: With no hepatic decompensation, DOC - Zinc aloneWith hepatic decompensation - zinc+trientene for 4months followed by zinc alone as maintenance therapy.Ref: -recent study', 'role': 'assistant'}]