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': 'After a transient ischemic attack, chances of stroke are maximum in \nSelect and explain. \nA. First 48 hours, B. First 10 days, C. First 1 month, D. First 5 months', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer-A. First 48 hoursThe largest study of risk of recurrent stroke after TIA showed that 50% of all ischemic strokes after TIA occur within 48 hours of the TIA.TIAs are episodes of stroke symptoms that last only briefly < 24h, but most TIAs last < 1 h.The risk of stroke after a TlA is- 1O - 15% in the first 3 months,with most events occurring in the first 2days.', 'role': 'assistant'}]