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': 'Fluctuating, recurring, variable sensorineural deafness is seen in \nSelect and explain. \nA. Serous otitis media, B. Hemotympanum, C. Perilabyrinthine fistula, D. Labrinthine concussion', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Sensorineural hearing loss is also seen in presbycusis, ototoxicity, Meniere&;s disease, acoustic neuroma, also been associated with diabetes, hypothyroidism, kidney disease, autoimmune disorders, multiple sclerosis and blood dyscrasias. Ref: PL DHINGRA diseases of ear nose and throat, 6th edition, page no 33', 'role': 'assistant'}]