<prompt> Platelet are stored in -22 - 2degC- 4degC- 2degC- 20degC  <response>: 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 1degCmin; 5 DMSO as a cryoprotective agent. 