This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Otosclerosis, Subject name: ENT
[{'content': "All are features of otosclerosis EXCEPT \nSelect and explain. \nA. Scwartz sign, B. Dip in audiogram, C. Endolymphatic hydrops, D. Willis' paracusis", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. c (Endolymphatic hydrops). (Ref. Diseases of ENT, PL Dhingra, 3rd ed., 58, 129)MENIERE'S DISEASE (endolymphatic hydrops)Otosclerosis (MH 05)- Classic triad of symptoms include:- Vertigo- Tinnitus- Sensory neural hearing loss- Tullio phenomenon: condition where loud sounds/ noise produces vertigo- Rinnie test positive: ABC decreases affected ear and lateralizes to normal.- Recruitment test positive- Tone decay test positive (20 decibel)- DiapJacusis: music seems discordant.- There occurs transformation of the Otic capsule into spongy bone, which latter becomes sclerotic bone.- Depression in audiogram and cahart's notch- Schwart's sign (red hue may be seen through the tympanic membrane of promontory)- Paracusis Willis (patient hears better in noisy surroundings)- Most commonly starts at fistula antefenestrum- Reduced compliance at ambient pressure i.e., type As tympanogram is diagnostic .- Stapedectomy is treatment of choice.", 'role': 'assistant'}]