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: Radiology
The best investigation to diagnose a case of acoustic neuroma is – 
Select and explain. 
A. Gadolinium enhanced MRI, B. CT scan, C. Audiometric analysis, D. PET scan
A: Gadolinium enhanced MRI
Answer: A: Gadolinium enhanced MRI 
Explanation: None