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 extraoral technique for maxillary nerve block, needle is directed into the: \nSelect and explain. \nA. Foramen ovale, B. Pterygopalatine fossa, C. Stylomastoid foramen, D. Posterior to lateral pterygoid plate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In extra oral technique for mandibular nerve block (Gow gates and Akinosi techniques are for intra oral mandibular anaesthesia), the needle is inserted from below the zygomatic arch and is directed posterior to the lateral pterygoid plate below the foramen ovale.\nIn extra oral technique for maxillary nerve block, the needle is directed anterior to lateral pterygoid plate into the pterygopalatine fossa.', 'role': 'assistant'}]