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: Surgery
[{'content': 'Most common cause of anorectal abscess is ? \nSelect and explain. \nA. Inflammation of anal gland, B. Folliculitis, C. Inflammation of rectal mucosa, D. Rectum', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Inflammation of anal gland", 'role': 'assistant'}]