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: Pathology
[{'content': 'In myocardial infarction, early light microscopic change is - \nSelect and explain. \nA. Waviness of fibres, B. Necrosis of fibres, C. Round cell infiltration, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]