This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'Gradenigo&;s syndrome is characterized by all except \nSelect and explain. \nA. Retro orbital pain, B. Abducent nerve involvement, C. Conductive deafness, D. Positive Griesinger sign', 'role': 'user'}, {'content': "Answer: D \nExplanation: Gradenigo's syndrome 1.Mastoid air cells responsible for Gradenigo's syndrome - petrous apex cells2.Triad - persistent ear discharge, external rectus palsy (6thnerve palsy) and retro orbital pain (7thnerve involvement)3.Seen in petrositis, a complication of CSOM4.Eagleton, Almoor, Ramadier & Frenker surgeries for draining petrositis abscesses(Refer: PL Dhingra, Textbook of Ear, Nose, Throat, 6thedition, pg no: 79)", 'role': 'assistant'}]