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': 'The predominant cell after 72 hours of myocardial infarction- \nSelect and explain. \nA. Neutrophile, B. Lymphocytes, C. Macrophages, D. Mast cells', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Acute inflammatory> reaction with a predominance of Neutrophils is seen upto 2-3 days.\nAfter 3 days (Le. after 72 hours Macrophages become the predominant cell type and become involved\xa0in the removal of necrotic debris.\nIn myocardial infarction.\nNeutrophils appear at → 12-24 hrs.\nGranulation tissue appear at → 6-10 days\nThe beginning of fibrosis and → 7-14 days\norganization of granulation tissue\nDevelopment of fibrous scar (hearing) → 2-6 weeks', 'role': 'assistant'}]