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
Shelf life of platelets in blood bank is? 
Select and explain. 
A. 5 days, B. 8 days, C. 10 days, D. 21 days
A: 5 days
Answer: A: 5 days 
Explanation: Platelets are stored in plasma or in additive solution up to 5-7 days at 20-24degC and under permanent motion.