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: Pathology
Commonest sites of intraabdominal abscess - 
Select and explain. 
A. Subphrenic, B. Paracolic, C. Pelvis, D. Retroperitoneal
C: Pelvis
Answer: C: Pelvis 
Explanation: Pelvis is the commonest site of intraabdominal abscess because of 2 reasons.

Because the vermiform appendix is often pelvic in position.
Because the fallopian tubes are frequent sites of infection.