Which of the following electronic configuration is not possible according to Hund's rule ?

According to Hund's rule, electron first fill in unpaired form in vacant orbital and then fill in paired form to stabilize the molecule by which 1s2  2s2  2px2  is not possible. According to Hund's rule, because 2px,  py, pz have the same energy level so electron first fills in unpaired form, not in paired form so it should be 1s2  2s2  2px1  2py1