This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'Shelf life of platelets to blood bank is \nSelect and explain. \nA. 5 days, B. 7 days, C. 10 days, D. 21 days', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Platelets are approved by FDA for stored upto 5days at 20-24 (RoomTemperature) because of risk of bacterial contamination. REF: ROBBINS pathology 10th edition', 'role': 'assistant'}]