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': 'Dose of rTPA in ischaemic stroke is \nSelect and explain. \nA. 60 mg, B. 90 mg, C. 100 mg, D. 120 mg', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 90 mg Recommended dose for thrombolysis with IV TPA is 0.9 mg/kg with the maximum dose being 90 mg. 10% should be given as a bolus over one minute, followed by remaining 90% as a continuous infusion over 60 minutes.", 'role': 'assistant'}]