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: Medicine
[{'content': 'The test of choice to detect perivalvular abscess of aortic valve is - \nSelect and explain. \nA. MRI of the heart, B. Transosophageal ECHO with Doppler, C. Ventriculography, D. CT Chest', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]