This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection, Subject name: Medicine
[{'content': 'A 30 year old man repos four hours after acquiring a clean wound without laceration. He had received TT vaccination 10 year back. What do you advice regarding tetanus prophylaxis? \nSelect and explain. \nA. Single dose of TT, B. Full course of TT, C. 1 dose TT and TIG, D. No vaccination needed', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Single dose of TT', 'role': 'assistant'}]