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.                 \[1{{s}^{2}},2{{s}^{2}}2{{p}^{2}},3{{s}^{1}}\]