This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood Vessels of Thorax, Subject name: Anatomy
[{'content': 'Arch of aorta begins and ends at which vertebral level - \nSelect and explain. \nA. C7, B. T1, C. T4, D. T8', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., T4StructureCervico thoracic levelTracheal bifurcationT4-T5Arch of aortaBegins and ends at T4Xiphoid processT9Splenic axisAlong 10th ribCarotid bifurcation, Hyoid boneC3Upper border of thyroid cartilageC4Level of cricoids cartilageC6 Lumbar levelCeliac trunkT12-L1Superior mesenteric arteryLITranspyloric planeLower border of L1Termination of spinal cordLower border of LI in adults and upper border of L3 in newbornPancreasL1-L2Left renal veinL2Inferior mesenteric arteryL3UmbilicusL3Aortic bifurcationL4Transtubercular planeL5Common iliac ends atL5-S1", 'role': 'assistant'}]