This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
Catgut suture is derived from which part of the sheep- 
Select and explain. 
A. Stomach, B. Intestine, C. Muscle, D. Ligaments
B: Intestine
Answer: B: Intestine 
Explanation: Ans. is 'b' i.e., Intestine o Catgut suture is prepared from the submucosa of the first one-third of the small intestine of sheep or cow.o Chromic catgut is made by treating catgut with chromic acid salt. This delays the hydrolysis of suture.