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': "Dressler's syndrome is due to: March 2005 \nSelect and explain. \nA. Cor pulmonale, B. Mitral stenosis, C. Myocardial infarction, D. Pulmoonary embolism", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C: Myocardial infarction It occurs following transmural infarction or open hea surgery. Believed to have immunologic cause-Possibly a latent viral infection may be involved in cause. Clinical-Symptoms typically appear 2-3 weeks following infarct/surgery. May last for weeks or months Pleuritic chest pain (91%) Fever Pericardial and pleural effusion Pericardial friction rub Effusions can be bloody and cause tamponade Imaging Findings: Pleural effusions (83%) Parenchymal opacities (74%) Enlarged cardiac silhouette from pericardial effusion (49%)', 'role': 'assistant'}]