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
Characteristic feature of Otosclerosis are all except: 
Select and explain. 
A. Conductive deafness, B. Positive Rinne's test, C. Paracusis willisii, D. Mobile ear drum
B: Positive Rinne's test
Answer: B: Positive Rinne's test 
Explanation: Tuning Fork Tests in OtosclerosisRinnes test-negativeWebers test-lateralised to ear with greater conductive lossAbsolute bone conduction-normal (It is decreased in cochlear otosclerosis)Pure tone audiometry-shows loss of air conduction more for lower frequency. * Tympanic membrane is normal and mobile in 90% cases. Schwaz sign--Flammingo cases pink colour of tympanic membrane is seen in 10% cases. It indicates active focus with increased vascularity.Stapes footplate--Shows a rice grain / biscuit type appearanceBlue mantles are seen histopathologically.