Assuming $\mathrm{V}_{\text {CEsat }}=0.2 \mathrm{~V}$ and $\beta=50$, the minimum base current $\left(I_{v}\right)$ required to drive the transistor in the given figure to saturation is
- $56 \; \mu \mathrm{A}$
- $140 \mathrm{~mA}$
- $60 \mu \mathrm{A}$
- $3 \; \mathrm{~mA}$