This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Upper border of thyroid cailage is at 
Select and explain. 
A. C2, B. C5, C. C6, D. T1
B: C5
Answer: B: C5 
Explanation: The thyroid gland lies against veebrae C5, C6, C7 and T1 embracing the upper pa of the trachea Each lobe extends from the middle of cailage to the fouh or fifth tracheal ring The isthmus extends from second to the fouh tracheal ring Ref BDC volume3,6th edition pg 140