<prompt> A 10 years boy presented with sensory neural deafness not benefited with hearing aid, Next treatment isCochlear implantFenestromyStapedectomyStapes fixation  <response>: A. i.e. Cochlear implant 125- Maqbool 11th 121- Dhingra 4thCOCHLEAR IMPLANT - is indicated in patients with bilateral severe sensorineural deafness who do not respond to amplified sound stimuli Cochlear implants are more useful in post lingually deaf patients i.e. who lost their hearing after acquisition of language Stapedectomy with prosthesis replacement is the treatment of choice for otosclerosis Pathway for extension of the infection from meninges to labyrinth - Cochlear aqueduct Cochlear implants electrodes are most commonly placed at cochlea to directly stimulate the fibre of VIII. nerve 