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
Drug of choice for Wilson's disease with hepatic compensation? 
Select and explain. 
A. Zinc, B. Zinc and Trientene, C. Thiomolybdate, D. Pencillamine
B: Zinc and Trientene
Answer: B: Zinc and Trientene 
Explanation: With no hepatic decompensation, DOC - Zinc aloneWith hepatic decompensation - zinc+trientene for 4months followed by zinc alone as maintenance therapy.Ref: -recent study