<prompt> Common age for otosclerosis is -5-10 yrs10-20 yrs20-30 yrs30-45 yrs  <response>: 50 of patients of otosclerosis have positive family history.Females are more commonly affected than males. Note: unless and until the question says in India always mark female male as the correct option.Whites are affected more than negroes.Age most common between 2030 years Ans. 3 and is rare before 10 and after 40 years.Deafness is increased by pregnancy, menopause, trauma and major operations.Viruses like measles virus have also been associated with it. 