<prompt> Which among the following is not true about otosclerosis?Hearing better in louder conditionsEustachian tube is always abnormalTympanic membrane is normalBilateral progressive conduction deafness  <response>: Otosclerosis- Enchondral bone conve to spongy bone Fissula ante fenestrum is mc site - Conductive Hearing loss- Paracusis willsi - patient hear better in noisy - Eustachian tube is normal- Carhas notch - dip at 2000hz 