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 of the following statement is true regarding inguinal hernia: 
Select and explain. 
A. Pain could indicate obstruction, B. Direct inguinal hernia is more common in children, C. Spigelian hernia occur through rectus sheath, D. Inguinal hernia is more common on left side
A: Pain could indicate obstruction
Answer: A: Pain could indicate obstruction 
Explanation: "Spigelian hernia is a type of interparietal hernia occurring at the level of the arcuate line just lateral to the rectus muscles" "Obstructed hernia: The symptoms (colicky abdominal pain & tenderness over hernia site) are less severe and the onset is more gradual than in strangulated hernia" "Both inguinal and femoral hernia occur more commonly on the right side. This is attributed to a delay in atrophy of the processus vaginalis after the normal slow descent of the right testis to the scrotum during the fetal development" Ref: L & B 25/e, Page 968-70; 24/e, Page 1272 CSDT 12/e, Page 766