This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'Best management for a contaminated wound with necrotic material \nSelect and explain. \nA. Debridement, B. Tetanus toxoid, C. Gas gangrene serum, D. Broad spectrum antibiotics', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Necrotic tissue acts as foci of infection and slows down healing. So Debridement is neccesary after initial assessment. Debridement : A wound should be explored and debrided to the limit of blood staining. Devitalized tissue must be excised until bleeding occurs with obvious exceptions of nerves, vessels and tendons.', 'role': 'assistant'}]