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: Anatomy
[{'content': 'Common facial vein drains into \nSelect and explain. \nA. Internal jugular vein, B. External jugular vein, C. Subclavian vein, D. Suboccipital veinous plexus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Key concept:\nThe superﬁcial temporal vein descends in front of the tragus, enters the parotid gland, and joins the maxillary vein to form the retromandibular vein. The anterior division of the retromandibular vein\xa0unites with the facial vein to form the common facial vein which drains into the internal jugular vein.', 'role': 'assistant'}]