This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
Catgut is preserved in 
Select and explain. 
A. Glutraldehyde, B. Isopropyle alcohol, C. Iodine, D. Cetrimide
B: Isopropyle alcohol
Answer: B: Isopropyle alcohol 
Explanation: The catgut suture is supplied sterile in "pre-cut" lengths or non-needled or attached to various needle in packing fluid containing: o 90% Isopropyl Alcohol, o 0.5% Sodium Benzoate, o 0.5% Diethylethanolamine and o water q.s. ad 100%.