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
All of the following are used in cryosurgery except- 
Select and explain. 
A. A Liquid nitrogen, B. Argon, C. Helium, D. Carcon dioxide
C: Helium
Answer: C: Helium 
Explanation: Ans. is 'c' i.e., Helium [Ref: style="font-size: 1.04761904761905em; font-family: Times New Roman, Times, serif; margin: 0 0 0 8px; text-indent: 0">Cryosurgeryo Cryosurgery (cryotherapy) is the use of extreme cold in surgery to destroy abnormal or diseased tissueAgent used in cryosurgery# carbon dioxide# liquid nitrogen# argon# dimethyl ether