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': 'The thoracic duct crosses from the right to the left at the level of \nSelect and explain. \nA. T12 veebra, B. T 6 veebra, C. T4 veebra, D. T2 veebra', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. T4 veebrae', 'role': 'assistant'}]