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': 'In the extraoral technique for mandibular nerve\nblock the needle after contacting the pterygoid plate is directed \nSelect and explain. \nA. Anteriorly, B. Posteriorly, C. Superiorly, D. Inferiorly', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]