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': 'Test for reversible cardiac ischemia- \nSelect and explain. \nA. Angiography, B. Thallium scan, C. MUGA, D. Resting Echocardiography', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]