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
Which nerve is responsible for referred pain in ear? 
Select and explain. 
A. Trochleal, B. Olfactory, C. Glossopharyngeal, D. Abducent
C: Glossopharyngeal
Answer: C: Glossopharyngeal 
Explanation: Pharyngitis may cause referred pain in the ear as both are supplied by IX nerve. Ref: BD Chaurasia's HUMAN ANATOMY, Volume 3, 4th edition.