This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Catgut suture is derived from which pa of the sheep 
Select and explain. 
A. Stomach, B. Intestine, C. Muscle, D. Ligaments
C: Muscle
Answer: C: Muscle 
Explanation: Answer- C. MuscleCatgut suture is prepared from the submucosa of the first one-third of the small intestine of sheep or cow.Chromic catgut is made by treating catgut with cbromic acid salt.