This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
Most impoant disadvantage of cryosurgery for hemorrhoid is: 
Select and explain. 
A. Pain, B. Infection, C. Profuse watery discharge, D. Hemorrhage
A: Pain
Answer: A: Pain 
Explanation: Most impoant disadvantage of cryosurgery for hemorrhoid is Pain Cryosurgery: The extreme cold (-196oC) of liquid nitrogen application causes coagulation necrosis of the piles, which subsequently seperated and dropped off. Cryosurgery for hemorrhoids cause Pain Mucous discharge (Not watery discharge) Ref: Bailey 27th edition Pgno: 1259