This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Back and Thorax, Subject name: Anatomy
[{'content': 'Thoracic duct does NOT drain: \nSelect and explain. \nA. Right upper pa of body, B. Left upper pa of body, C. Right lower pa of body, D. Left lower pa of body', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Right upper quadrant of the body drains the lymphatics into the right lymphatic duct and rest of the body drains into thoracic duct Thoracic duct is continuation of cysterna chyli as it pass through aoic hiatus begin at lower border of T12 . At T5(angle of louis) it crosses to left side and drains at left Jugulo-subclan venous angle at C7 .', 'role': 'assistant'}]