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': "True about Dressler's syndrome is all, except \nSelect and explain. \nA. Presents as sub sternal chest pain, B. Usually occurs within hours after MI, C. May be due to early use of anti coagulant, D. Responds to aspirin therapy", 'role': 'user'}, {'content': "Answer: B \nExplanation: Dressler's syndrome (Fibrinous Pericarditis):\nIt is an autoimmune reaction and manifest after 2 - 3 weeks after MI.", 'role': 'assistant'}]