This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
A cochlear implant can be used in all of the following conditions causing bilateral severe to profound loss: 
Select and explain. 
A. Meningitis, B. Otosclerosis, C. Ototoxic drugs, D. Section of CN VIII
D: Section of CN VIII
Answer: D: Section of CN VIII 
Explanation: Cochlear implant electrode(s) stimulate fibres of CN VIII or ganglion cells. It assumes CN VIII is normal to carry impulses. If CN VIII has been cut as in removal of acoustic neuroma cochlear implant is ineffective, instead a brain-stem implant is used to stimulate cochlear nuclei.