This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'Gradeneigo syndrome is characterized by all the following except - \nSelect and explain. \nA. Diplopia, B. Retroorbital pain, C. Persistent ear discharge, D. Preauricular sinus', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Preauricular sinus * Gradenigo syndrome has been explained in previous sessions.", 'role': 'assistant'}]