<prompt> Most common site for the initiation of otosclerosis isFood plate of stapesMargins of stapesFissula ante fenestrumFissula post fenestrum  <response>: In stapedial otosclerosis which is the most common variety, the lesion stas just in front of the oval window in an area called fissula ante fenestram. Ref: Diseases of EAR, NOSE, THROAT by PL Dhingra; 7th Edition; page no.95 