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': 'Intra aerial thrombolysis is indicated in \nSelect and explain. \nA. Suspected occlusion of larger aery, B. History of subarachnoid hemorrhage, C. History of dementia, D. Stroke of > 6 hours duration', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. Suspected occlusion of larger aeryAcute ischemic stroke < 6 hours in durationStroke is significant, (i.e., disabling or life threatening)Suspected occlusion of a large aery (i.e., non-lacunar stroke syndrome)No hemorrhage on screening computed tomography scan', 'role': 'assistant'}]