This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Microbiology
The operating temperature in an ethylene oxide sterilization during a warm cycle is: 
Select and explain. 
A. 49-63, B. 92-110, C. 20-35, D. 68-88
A: 49-63
Answer: A: 49-63 
Explanation: Ans. is 'a' i.e, 49-63(Ref: Ananthanarayan, 9th/e, p. 35, 36; Baveja, 4th/e, p. 38)EO sterilization cycles - Cold cycle at 37+-5 and Warm cycle 54+-5.