This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of the Anal Canal, Subject name: Surgery
[{'content': 'Five days self Limiting Rectal painful bleeding- \nSelect and explain. \nA. Proctalgia fugax, B. Internal hemorrhoides, C. External hemorhoides, D. Thrombosed external haemorrhoids', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e.. Thrombosed external hemorrhoids", 'role': 'assistant'}]