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: Medicine
A 60 year old man presents with choreoathetosis. O/e KF rings is seen in cornea. Initial treatment of choice is 
Select and explain. 
A. Zinc, B. Penicillamine, C. Pyridoxine, D. Trientine
A: Zinc
Answer: A: Zinc 
Explanation: Zinc is the initial treatment of choice.