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
[{'content': 'Which of the following is most commonly used for preservation of organs for transplantation: March 2004 \nSelect and explain. \nA. Formalin, B. Ringer lactate, C. University of Wisconsin solution, D. Dextrose 5%', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C i.e. University of Wisconsin solution', 'role': 'assistant'}]