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: Surgery
Which of the following is not a component of University of
Wisconsin? 
Select and explain. 
A. Adenosine, B. Glutathione, C. Allopurinol, D. Potassium citrate
D: Potassium citrate
Answer: D: Potassium citrate 
Explanation: None