This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Platelet & Coagulation disorders, Subject name: Medicine
[{'content': 'Shelf life of platelets in blood bank is? \nSelect and explain. \nA. 5 days, B. 8 days, C. 10 days, D. 21 days', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Platelets are stored in plasma or in additive solution up to 5-7 days at 20-24degC and under permanent motion.', 'role': 'assistant'}]