This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AIIMS 2019, Subject name: Medicine
Which drug is not given in Wilson disease? 
Select and explain. 
A. Trientine, B. Calcium, C. Penicillamine, D. Zinc
B: Calcium
Answer: B: Calcium 
Explanation: Wilson disease Trientine- copper chelator Penicillamine- also chelator but less used due to nephrotic side effect. Zinc- is competitive inhibitor of copper in absorption of gut. Zinc acetate is DOC for Wilson disease.