This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Medicine
[{'content': 'Which test is performed to detect stunned (reversible) myocardial ischemia? \nSelect and explain. \nA. Coronary angiography., B. PET scan, C. ECG, D. Resting echocardiography', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. PET scana. PET scan is a type of nuclear scan.b. LV dysfunction can be due to non-contractile or hypercontractile segments that are viable but are chronically ischemic (Hibernating Myocardium).', 'role': 'assistant'}]