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': 'Five day self limting pain is due to \nSelect and explain. \nA. Internal hemorrhoids, B. External hemorrhoids, C. Fistula in ano, D. Fissure in ano', 'role': 'user'}, {'content': 'Answer: B \nExplanation: External hemorrhoids which are painful the pain reduces after 5 days.', 'role': 'assistant'}]