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: Social & Preventive Medicine
[{'content': 'A patient comes with CLW on knee 10x2 cm, 12 hours old. He had taken TT 6 months back for another injury. What should be done ? \nSelect and explain. \nA. Nothing should be done, B. One dose of TT with immunoglobulin, C. Full course of TT, D. Full course of TT with immunoglobulin', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., One dose of TT with immunoglobulin Prevention of tetanus after injury All wounds must be thoroughly cleaned soon after injury - removal of foreign bodies, soil dust, necrotic tissue. This procedure will abolish anaerobic conditions which our germination of tetanus spore.", 'role': 'assistant'}]