This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diseases of Inner Ear and Vestibular Schwannoma, Subject name: ENT
[{'content': 'True about Vestibular Schwannoma is \nSelect and explain. \nA. Converging ABLB Laddergram, B. Recruitment phenomenon is present, C. High SISI score, D. Rollover phenomenon is seen', 'role': 'user'}, {'content': "Answer: D \nExplanation: Meniere's disease is an impoant differential for acoustic neuroma as the patients suffer from similar symptoms. Meniere's is a cochlear pathology and acoustic neuroma is retrocochlear. Audiological diagnostics: Test Cochlear Retro- Cochlear S.I.S.I Positive ( >70%) Negative A.B.L.B Laddergram Converging Diverging Tone Decay Negative( <25 dB) Positive ( >25dB) Speech Audiometry SDS = 60-80% <40%, Roll over phenomenon B.E.R.A ( Wave V Latency) </= 4.2 msec >4.2 msec", 'role': 'assistant'}]