This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
Relative humidity in operation theatre should be maintained at? 
Select and explain. 
A. 35-45%, B. 45-55%, C. 55-65%, D. 65-75%
C: 55-65%
Answer: C: 55-65% 
Explanation: Ans. (c) 55-65Ref: Bailey & Love 26thed.page 248, 25thed page 210