in the given figure, given that vbb supply can vary from 0 to 5.0 v,  , the minimum base current and the input voltage at which the transistor will go to saturation, will be, respectively : 



option 1) 25  and 3.5 v

option 2) 25  and 2.8 v

option 3) 20  and 2.8 v

option 4) 20  and 3.5 v
question
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