This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
The commonest site of an intraperitoneal abscess 
Select and explain. 
A. Pelvis, B. Subphrenic space, C. Periappendicular, D. Paracolic gutter
A: Pelvis
Answer: A: Pelvis 
Explanation: Pelvis is the most common intraperitoneal abscess.(50-60%).It is the collection of pus in rectovesical or rectouterine pouch(pouch of Douglas). The pelvis is the commonest site of an intraperitoneal abscess because the vermiform appendix is often pelvic in position and the fallopian tubes are frequent sites of infection. Reference:Bailey & Love's sho practise of surgery,25th edition,page no:996;SRB's manual of surgery,5th edition,page no:576.