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': 'The usual location of Glomus jugular tumor is: \nSelect and explain. \nA. Epitympanum, B. Hypotympanum, C. Mastoidal cell, D. Promontory', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B Hypotympanum Glomus tumor is of 2 types: Glomus jugulare Glomus tympanicum Arises from: Dome of jugular bulb Hypotympanum Invades: Jugular foramen therefore involves cranial nerves IX to XII and compresses jugular vein Clinical features: * Signs of com pre ion of cranial nerves IX to XII Arises from Promontory of middle ear Clinical features: * Aural symptoms sometimes with facial paralysis', 'role': 'assistant'}]