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: Pathology
[{'content': 'Platelet are stored in - \nSelect and explain. \nA. 22 +- 2degC, B. - 4degC, C. - 2degC, D. - 20degC', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 22 +- 2degC Two methods of storage of platelats. 1. Liquid storage : Both whole blood derived and apheresis platelets concentrates may be storage for 5 days using following some principles. (a) Temperature must be 20_ 24degC. (b) Storage container must be constructed of a plastic material that allows adequate diffusion of 0; to meet cells metabolic needs. (c) Platelets concentrates must be agitated during storage. 2. Frozen Storage : The most widely used method for frozen storage employs controlled rate freezing (1degC/min); 5% DMSO as a cryoprotective agent.", 'role': 'assistant'}]