Which of the following electronic configuration is not possible according to Hund?s rule [Kerala PMT 2004]

• A.                 \[1{{s}^{2}}2{{s}^{2}}\] 
• B.                 \[1{{s}^{2}}2{{s}^{1}}\]
• C.                 \[1{{s}^{2}}2{{s}^{2}}2p_{x}^{1}2p_{y}^{1}2p_{x}^{1}\]
• D.                 \[1{{s}^{2}}2{{s}^{2}}2p_{x}^{2}\]
• E.                 \[1{{s}^{2}}2{{s}^{2}}2p_{x}^{2}2p_{y}^{1}2p_{z}^{1}\]