This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
[{'content': "Phelps sign is seen in - \nSelect and explain. \nA. Glomus jugulare, B. Vestibular Schwannoma, C. Ménière's disease, D. Neurofibromatosis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]