Identify the odd one out from the following structures.

Two friends are eating together on a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of

Where are the arytenoid cartilages found?

What is the length and diameter of the trachea?

Where are the vocal cords found?

The structure which prevents the entry of food into the respiratory tract is