This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hernia, Subject name: Surgery
Viscera forms wall of which hernia? 
Select and explain. 
A. Lumbar hernia, B. Sliding hernia, C. Epigastric hernia, D. Femoral hernia
B: Sliding hernia
Answer: B: Sliding hernia 
Explanation: Ans. (b) Sliding hernia* Posterior wall of the sliding hernia is not only formed by sac but also by retroperitoneal structures.* MC structure being Sigmoid colon* Barium Enema is the preferred investigation to confirm the presence of Sigmoid Colon in Scrotum. (IOC for confirming Sliding hernia)