This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
Arch of aoa lies at what veebral level 
Select and explain. 
A. T5, B. T4, C. T6, D. T2
B: T4
Answer: B: T4 
Explanation: Arch of aoa stas and ends at same level that is lower border of fouh thoracic veebrae. BD CHAURASIA'S HUMAN ANATOMY.VOLUME 1. 6TH EDITION.Page no-275