This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharynx, larynx and trachea and cranial nerves 3,4,6, Subject name: Anatomy
Nerve liable to get injured on removing the fish bone from pyriform fossa:- 
Select and explain. 
A. Superior laryngeal nerve, B. Internal laryngeal nerve, C. External laryngeal nerve, D. Recurrent laryngeal nerve
B: Internal laryngeal nerve
Answer: B: Internal laryngeal nerve 
Explanation: Pyriform fossa is located on the side of epiglottis. It is supplied by Internal laryngeal nerve. Hence this nerve is liable to get injured while removing a fish bone from pyriform fossa. .