Which of the following is the agent of choice for cryosurgery?: (A) Nitrous oxide, (B) CO2 snow, (C) Liquid nitrogen spray, (D) Freons
Answer is C. This has a temperature of -196 c(spray/probe) & the only cryogen advocated for malignant skin lesions. Ref: Textbook of dermatosurgery & cosmetology, satish S savant, E-2,P-117.