This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
Dose of rTPA in ishaemic stroke is? 
Select and explain. 
A. 6O mg, B. 90 mg, C. 100 mg, D. 120 mg
B: 90 mg
Answer: B: 90 mg 
Explanation: *-PA(recombinant tissue plasminogen activator) is administered as 0.9mg/kg IV(max. 90 mg)IV as 10% of total dose by bolus ,followed by remainder as total dose over 1hr. Ref Harrison20th edition pg 2445