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 stas at : \nSelect and explain. \nA. Continuation of cystema chyli, B. Right lymphatic duct, C. Junction of azygous vein and IVC, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Continuation of cystemachyle', 'role': 'assistant'}]