This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
The cough response caused while cleaning the ear canal is mediated by stimulation of- 
Select and explain. 
A. The V cranial nerve, B. Innervation of external ear canal by C1 and C2, C. The X cranial nerve, D. Branches of the VII cranial nerve
C: The X cranial nerve
Answer: C: The X cranial nerve 
Explanation: “Irritation of the auricular branches of the vagus in the external ear (by ear wax, syringe, etc.) may reflexly cause cough, vomiting, or even
death due to sudden cardiac inhibition.”
Auricular branch of the vagus nerve is also known as Arnold’s nerve or Alderman’s nerve.
Also Know
Similarly irritation of recurrent laryngeal nerve by enlarged lymph nodes in children may also produce a persistent cough.