This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'The danger area of the face is so called because of the connection of the facial veins to the cavernous sinus through the \nSelect and explain. \nA. Transverse facial vein, B. Superior ophthalmic vein, C. Maxillary vein, D. Ethmoidal vein', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ref: Gray's 40e/p256", 'role': 'assistant'}]