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In a common emitter configuration with suitable bias, it is given than $R_L$ is the load resistance and $R_{BE}$  is small signal dynamic resistance (input side). Then, voltage gain, current gain and power gain are given, respectively, by: [ $\beta $ is current gain, $I_B$ , $I_C$ , $I_E$ are respectively base, collector and emitter currents]

• A
  $\beta \frac{{{R_L}}}{{{R_{BE}}}},\frac{{\Delta {I_E}}}{{\Delta {I_B}}},{\beta ^2}\frac{{{R_L}}}{{{R_{BE}}}}$
• B
  ${\beta ^2}\frac{{{R_L}}}{{{R_{BE}}}},\frac{{\Delta {I_C}}}{{\Delta {I_B}}},\beta \frac{{{R_L}}}{{{R_{BE}}}}$
• C
  ${\beta ^2}\frac{{{R_L}}}{{{R_{BE}}}},\frac{{\Delta {I_C}}}{{\Delta {I_E}}},{\beta ^2}\frac{{{R_L}}}{{{R_{BE}}}}$
• ✓
  $\beta \frac{{{R_L}}}{{{R_{BE}}}},\frac{{\Delta {I_C}}}{{\Delta {I_B}}},{\beta ^2}\frac{{{R_L}}}{{{R_{BE}}}}$