This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
Cochlear implants conve what energy to which form of energy 
Select and explain. 
A. Sound energy to mechanical energy to move the hair cells, B. Electrical energy to mechanical energy to move the hair cells, C. Sound energy to electrical impulses, D. Mechanical energy to electrical impulses
C: Sound energy to electrical impulses
Answer: C: Sound energy to electrical impulses 
Explanation: Ans. is 'c' i.e., Sound energy to electrical impulses [Ref: NIH Publication No. 11-4798 (2013-11-01).