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': '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: Pulsatile tinnitus – Seen in Glomus tumor\nPulsatile otorrhea – Seen in ASOM', 'role': 'assistant'}]