In the figure, given that $V_{BB}$ supply can vary from $0$ to $5.0 V, V_{CC}=5 V, {\beta }_{dc}=200,$ $R_B=100 k\Omega ,$ $R_C=1k\Omega$ and $V_{BE}=1.0\mathrm{V.}$ The minimum base current and the input voltage at which the transistor will go to saturation, will be, respectively:

• A

  $25 \mu A$ and $2.8 V$
• B

  $20\mu A$ and $2.8V$
• Correct answer
  C

  $25\mu A$ and $3.5V$
• D

  $20\mu A$ and $3.5V$

Hence, the correct answer is option: 'C'.