Explanation:
\({G=100 \Omega \quad I=100 {~mA}}\)
\({I_g} = 10\;mA\,\,\,\,\,S = ?\)
\(S = \left( {\frac{{{I_g}}}{{I - {I_g}}}} \right)G = \left( {\frac{{10}}{{100 - 10}}} \right)100\)
\(\,\,\,\,\, = \left( {\frac{{10}}{{90}}} \right)100\;m\Omega \)
\({S=11.11 \Omega}\).
So correct option is (1)