c
(c)Voltage gain \( = \frac{{{\rm{Output voltage}}}}{{{\rm{Input voltage}}}}\)
\(⇒\)\( V_{out} = V_{in} ×\) Voltage gain
\(⇒\)\(V_{out} = V_{in} ×\) Current gain \(×\) Resistance gain
\(= V_{in} ×\beta × \frac{{{R_L}}}{{{R_{BE}}}}\)= \({10^{ - 3}} \times 100 \times \frac{{10}}{1} = 1V.\)