This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Trachea, Subject name: Anatomy
Trachea bifurcates at- 
Select and explain. 
A. T4-T5, B. T5-T6, C. T6-T7, D. t7-t8
A: T4-T5
Answer: A: T4-T5 
Explanation: Ans. is 'a' i.e. T4-T5 Trachea extends from the lower border of cricoid cartilage opposite C6 to the upper border of TyLength of trachea - 10-11 cm*