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': 'Which of the following is the preferred local\nanesthetic technique for hemophiliacs? \nSelect and explain. \nA. Nerve block, B. Supraperiosteal, C. Intraligamentary, D. Field block', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]