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
All are true about cochlear implant except: 
Select and explain. 
A. Minimum age is 1 year, B. PTA of 70 dB or more, C. Switch on is done after 3 weeks, D. MRI has no role in pre op assessment
D: MRI has no role in pre op assessment
Answer: D: MRI has no role in pre op assessment 
Explanation: Pre op investigation done before an implant is placedComplete audiological evaluationHRCT