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
[{'content': 'A patient is suspected to have Vestibular Schwannoma. The investigation of choice for its diagnosis is: \nSelect and explain. \nA. Contrast enhanced CT scan, B. Gadolinium enhanced MRI, C. SPECT, D. PET scan', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Gadolinium enhanced MRI', 'role': 'assistant'}]