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
Which is the most common cause of bowel obstruction 
Select and explain. 
A. Hernia, B. Ulcers causing obstruction, C. Adhesions, D. Structure
C: Adhesions
Answer: C: Adhesions 
Explanation: Adhesion will cause dynamic bowel obstruction