This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Surfaces and Grooves, Subject name: Anatomy
[{'content': 'Trachea bifurcates at the veebral level:- \nSelect and explain. \nA. T2, B. T3, C. T4, D. T5', 'role': 'user'}, {'content': 'Answer: D \nExplanation: T5 veebra level and structures Carina- cailage at the bifurcation of trachea Left principal bronchus Right principal bronchus Ascending aoa (anterior) Descending aoa (posterior) Pulmonary trunk dividing into right and left pulmonary aeries', 'role': 'assistant'}]