This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumors of Ear, Subject name: ENT
[{'content': 'Pulsatile tinnitus in ear is due to: \nSelect and explain. \nA. Malignant otitis media, B. Osteoma, C. Mastoid reservoirs, D. Glomus jugulare tumour', 'role': 'user'}, {'content': 'Answer: D \nExplanation: (d) Glomus jugulare tumour(Ref. Scott Brown, 8th ed., Vol 2 page 1283)For the tinnitus to be pulsatile the cause has to be vascular. Vascular causes to tinnitus are Glomus jugulare and internal carotid aneurysms.', 'role': 'assistant'}]