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': 'MC complication following hemorrhoidectomy is: March 2013 (h) \nSelect and explain. \nA. Hemorrhage, B. Infection, C. Fecal impaction, D. Urinary retention', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D i.e. Urinary retention', 'role': 'assistant'}]