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': "Phelp's sign is seen in: \nSelect and explain. \nA. Glomus jugulare, B. Vestibular Schawannoma, C. Maniere's disease, D. Neurofibromatosis", 'role': 'user'}, {'content': "Answer: A \nExplanation: Phelp's sign Phelp sign This sign is seen on CT scan In CT- in case of glomus jugulare tumor the normal crest between the carotid canal and jugulare tumor is absent whereas it is not so in case of glomus tympanicum", 'role': 'assistant'}]