On doping germanium with donor atoms of density \[{{10}^{17}}\,c{{m}^{-3}}\] its conductivity in mho/cm will be [Given \[{{\mu }_{e}}=3800\,c{{m}^{2}}V-s\] and \[{{n}_{i}}=2.5\times {{10}^{13}}c{{m}^{-13}}\]]

• A. \[30.4\]
• B. \[60.8\]
• C. \[91.2\]
• D. \[121.6\]