d
(d) \(CGS\)    \(SI \)

  \({N_1}{U_1} = {N_2}{U_2}\)

\({N_1}\left[ {{M_1}L_1^{ - 3}} \right] = {N_2}\left[ {{M_2}L_2^{ - 3}} \right]\)

\(\therefore  {N_2} = {N_1}\left[ {\frac{{{M_1}}}{{{M_2}}}} \right] \times {\left[ {\frac{{{L_1}}}{{{L_2}}}} \right]^{ - 3}}\)

\( = 0.625\left[ {\frac{{1g}}{{1kg}}} \right] \times {\left[ {\frac{{1cm}}{{1m}}} \right]^{ - 3}}\)

\( = 0.625 \times {10^{ - 3}} \times {10^6} = 625\)