Which of the following electronic configuration is not possible [MHCET 2003]

• A. \[1{{s}^{2}}2{{s}^{2}}\]
• B. \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}}\]
• C. \[[Ar]\,3{{d}^{10}},4{{s}^{2}}4{{p}^{2}}\]
• D. \[1{{s}^{2}},2{{s}^{2}}2{{p}^{2}},3{{s}^{1}}\]