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': 'Hematoma formation is more frequent with \nSelect and explain. \nA. Inferior alveolar nerve block, B. Posterior superior alveolar nerve block, C. Greater palatine nerve block, D. Infraorbital nerve block', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]