This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small & Large Intestine, Subject name: Surgery
[{'content': 'A 25-year-old patient with a 2-cm painful abscess in perianal region for 1 day. The patient does not have fever or leukocytosis. Which space is this lesion in? SELECT ONE. \nSelect and explain. \nA. Supralevator space, B. Perianal space, C. Levator ani muscle, D. Intermuscular space', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Perianal abscess is most common type of anorectal abscess. It is superficial and lies in perianal space. Duration of symptoms is short and patient is unlikely to have fever or leukocytosis.', 'role': 'assistant'}]