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
[{'content': 'Most common site of anorectal abscess is? \nSelect and explain. \nA. Perianal, B. Ischiorectal, C. Pelvirectal, D. Intersphincetric', 'role': 'user'}, {'content': "Answer: A \nExplanation: Anorectal abscess: # Usually produces a painful, throbbing swelling in the anal region. The patient often has swinging pyrexia # Subdivided according to anatomical site into perianal, ischiorectal, submucous and pelvirectal # Underlying conditions include fistula-in-ano (most common), Crohn's disesase, diabetes, immunosuppression # Treatment is drainage of pus in first instance, together with appropriate antibiotics # Always look for a potential underlying problem Ref: Bailey & Love&;s Sho Practice of Surgery,E25,Page-1262", 'role': 'assistant'}]