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
[{'content': 'Which nerve is responsible for referred pain in ear? \nSelect and explain. \nA. Trochleal, B. Olfactory, C. Glossopharyngeal, D. Abducent', 'role': 'user'}, {'content': "Answer: C \nExplanation: 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.", 'role': 'assistant'}]