Answer-B- stapedial otosclerosisIn otosclerosis the normal dense endochondral layer of the bony otic capsule gets replaced by irregularly laid spongy bone. Most common site is fissula ante fenestram (anterior tothe oval window)Age group affected is 20-45 years (maximum between 20-30 years). Male:female ratio is 1:2.meniere's disease i.e Endolymphatic hydrops leads to SNHL and not conductive hearing loss.Tuning ForkTests in Otosclerosis: Rinnes test-negative ,Weber's test-lateralized to ear with greater conductive loss.