This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'Lyophilization means \nSelect and explain. \nA. Sterilizations, B. Freeze drying, C. Burning to ashes, D. Exposure to formation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Freeze-drying--technically known as lyophilization or cryodesiccation--is a dehydration process typically used to preserve a perishable material or make the material more convenient for transpo.Viruses can be preserved by storage at subfreezing temperatures, and some may withstand lyophilization and can thus be preserved in the dry state at 4degC or even at room temperature', 'role': 'assistant'}]