This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sutures and Anastomoses, Subject name: Surgery
[{'content': 'Catgut is preserved in:- \nSelect and explain. \nA. Glutaraldehyde, B. Isopropyl alcohol, C. Iodine, D. Cetrimide', 'role': 'user'}, {'content': "Answer: B \nExplanation: CATGUT Catgut is preserved in Isopropyl alcohol. Plain catgut is derived from submucosa of sheep's intestineQ. Plain catgut loses 50% tensile strength in 3 daysQand all tensile strength in 15 days and absorbed in 60 daysQ. Isopropyl alcoholQis used as preservative for packing catgut sutures.", 'role': 'assistant'}]