This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'All of the following will produce conductive hearing loss except \nSelect and explain. \nA. Otosclerosis, B. Serous otitis media, C. Endolymphatic Hydrops, D. Suppurative otitis media', 'role': 'user'}, {'content': "Answer: C \nExplanation: Otosclerosis, serous otitis media, suppurative otitis media come under acquired causes of conductive hearing loss Endolymphatic hydrops which is Meniere's disease is associated with sensorineural deafness. Ref: Dhingra 7e pg 32,34.", 'role': 'assistant'}]