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': 'IOC for acoustic neuroma \nSelect and explain. \nA. CT, B. GD enhanced MRI, C. Angiography, D. Four vessels DSA', 'role': 'user'}, {'content': 'Answer: B \nExplanation: IOC for acoustic neuroma - Gadolinium enhanced MRI.', 'role': 'assistant'}]