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: Dental
[{'content': 'Best method for sterilizing complex instruments and delicate materials: \nSelect and explain. \nA. Sunlight sterilization, B. Dry heat sterilization, C. Ethylene oxide sterilization, D. Chemiclave', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ethylene oxide sterilization is the best method for sterilizing complex instruments and delicate materials.\nPorous and plastic materials absorb the gas and require aeration for 24 hours or more before it is safe for them to contact skin or tissues.\nUnits with large chamber sizes hold more instruments or packs per cycle; however, they are very expensive.\nSome chamber designs or sizes are better suited to accept stacks of instrument trays. Manufacturers should be consulted to obtain detailed information about these sterilizers.\n\nSturdevants operative dentistry 4th edition page 374.', 'role': 'assistant'}]