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: Surgery
Gold standand for diagnosis of carotid body tumour is 
Select and explain. 
A. Duplex scanning, B. MRI, C. Computed Tomography, D. Cerebral angiography
B: MRI
Answer: B: MRI 
Explanation: None