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': 'Volume of infarcted area in acute myocardial infarction (AMI) can be detected by -a) ECHOb) ECGc) Levels of CPKMBd) Thallium scan \nSelect and explain. \nA. b, B. c, C. ac, D. ad', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]