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 only thrombolytic agent approved for the treatment of acute ischemic stroke is - \nSelect and explain. \nA. Tissue Plasminogen activator, B. Streptokinase, C. Urokinase, D. Pro-urokinase', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]