True about otosclerosis -a) 50% have family historyb) Males are affected twice than femalesc) More common in Negro's and African'sd) Deafness occurs in 20-30 yrs but less in before 10 yrs and after 40 yrse) Pregnancy has bearing on it: (A) ade, (B) bde, (C) abd, (D) ad
Answer is A. None