This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
[{'content': 'Inferior thyroid vein drains into \nSelect and explain. \nA. Internal jugular vein, B. Superior vena cava, C. Brachiocephalic vein, D. EXternal jugular vein', 'role': 'user'}, {'content': "Answer: C \nExplanation: The inferior thyroid veins emerge at the lower border of the isthmus. They form a plexus in front of the trachea and drain into the left brachiocephalic vein. Ref: BD Chaurasia's HUMAN ANATOMY, Volume 3, 4th edition.", 'role': 'assistant'}]