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
[{'content': 'In case of gout preservation of urine sample is done in- \nSelect and explain. \nA. Normal saline, B. Fonnaline, C. Alcohol, D. Distilled water', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]