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
Which of the following would be the most appropriate treatment for rehabilitation of a patient who has bilateral profound deafness following surgery for bilateral acoustic schwannoma 
Select and explain. 
A. Bilateral with powered digital hearing aid, B. Bilateral cochlear implants, C. Unilateral cochlear implant, D. Brain stem implant
D: Brain stem implant
Answer: D: Brain stem implant 
Explanation: Brainstem implants are used when the 8th nerve has been completely severed in surgery during removal of acoustic neuroma. Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, pg no. 141