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
Length of adult trachea 
Select and explain. 
A. 5-6 cm, B. 10-11 cm, C. 15-16cm, D. 20-21cm
B: 10-11 cm
Answer: B: 10-11 cm 
Explanation: Trachea is 10-15 cm length. <img src=" /> BD CHAURASIA'S HUMAN ANATOMY VOLUE1 .6 TH EDITION. PAGE NO 281