This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
[{'content': 'An old women, nanda suffered stroke for which she was given alteplase. She improved considerably. To prevent the recurrence of stroke, this patient is most likely to be treated indefinitely with: \nSelect and explain. \nA. Aspirin, B. Warfarin, C. Urokinase, D. Enoxaparin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref : KDT 6/e p608,609 Antiplatelet drugs like aspirin or clopidogrel are used to prevent aerial thrombosis (in diseases like MI and stroke).', 'role': 'assistant'}]