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': 'Thoracic duct terminates into the left brachiocephalic vein at the junction of: \nSelect and explain. \nA. External jugular vein and subclan vein, B. Internal jugular vein and subclan vein, C. External jugular vein and brachiocephalic vein, D. Internal jugular vein and brachiocephalic vein', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Internal jugular vein and subclan vein', 'role': 'assistant'}]