Characteristic feature of Otosclerosis are all except-: (A) Conductive deafness, (B) Positive rinne's test, (C) Paracusis willisii, (D) Mobile ear drum
Answer is B. You are aware of all options given in Question.
Just Remember: The following otoscopic findings in otosclerosis.
Remember:

Tympanic membrane is normal and mobile in 90% cases. (i.e. option d is correct).
Schwartz 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 appearance
Blue mantles are seen histopathologically.