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': 'An elderly female presents to the emergency department and was found to have a transmural myocardial infarction. Based on her ECG, she was started on thrombolytic therapy with streptokinase. On further examination, which of the following findings would indicate that the thrombolytic therapy is risky and should be stopped? \nSelect and explain. \nA. Pericardial friction rub, B. Mobitz Type II block, C. Significant pericardial effusion on echocardiography, D. Lower limb vein thrombosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]