This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
[{'content': 'Pelvic abscess presents as \nSelect and explain. \nA. Pain in perineum, B. Mucoid diarrhea, C. Distension, D. Vomiting', 'role': 'user'}, {'content': "Answer: B \nExplanation: Pelvic abscess is the most common intraperitoneal abscess(50-60%). It is the collection of pus in rectovesical or rectouterine pouch(pouch of Douglas). Causes include: appendicitis, pelvic infections, sequelae of diffuse peritonitis, post operative and other causes(Bacteria : Bacteroides fragilis, E.coli, anaerobic streptococci ). It presents as diarrhoea and passage of mucus in stools, high temperature with chills and rigors, lower abdominal pain and distension, frequency and burning micturition. Reference : page 574 SRB's manual of surgery 5th edition", 'role': 'assistant'}]