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': 'In the blood bank, platelets are stored at \nSelect and explain. \nA. 18°C for 1 year, B. 20 to 24°C for 35 days, C. 20 to 24°C for 3 to 5 days, D. 2 to 4°C for 35 days', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]