This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Management of Wounds, Subject name: Surgery
Catgut is prepared from submucosal layer of the intestine of: 
Select and explain. 
A. Cat, B. Sheep, C. Human being, D. Rabbit
B: Sheep
Answer: B: Sheep 
Explanation: Ans. (b) Sheep(Ref: Bailey 261e p37-38)Catgut points:* Discovered by John Hunter* Plain catgut is derived from Sheep submucosa of intestine* Plain catgut loses its strength by 50% in 3 days- Complete strength lost by 15 days and absorbed in 60 days* Isopropyl alcohol is used to preserve catgut.