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': "A 30- year old woman with family history of hearing loss from her mother's side developed hearing loss which is bilateral, slowly progressive, Pure tone audiometry bone conduction hearing loss with an apparent bone conduction hearing loss at 2000 Hz. What is the most likely diagnosis? \nSelect and explain. \nA. Otosclerosis, B. Acoustic neuroma, C. Otitis media with effusion, D. Sigmoid sinus thrombosis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]