This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
Which of the following is an Interstitial type of a hernia 
Select and explain. 
A. Richter's hernia, B. Spigelian hernia, C. Femoral hernia, D. Epigastric hernia
B: Spigelian hernia
Answer: B: Spigelian hernia 
Explanation: An interstitial hernia occurs when a hernia extends between the layers of muscle and not directly through themThis is typical of a Spigelian hernia.