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: Unknown
[{'content': 'In myocardial infarction the infarct acquires hyperemic rim with an yellow centre at \nSelect and explain. \nA. 3-7 days, B. 10-20 days, C. 7-14 days, D. 1-2 hours', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 3 – 7 days Findings\nGross examination at border\nSoftening yellow-tan center Histopathology\n(light microscopy)\nBeginning of disintegration of dead muscle fibers\nNecrosis of neutrophils\nBeginning of macrophageremoval of dead cells at border', 'role': 'assistant'}]