Which set has the same number of unpaired electrons in their ground state [JIPMER 2000]

• A. \[C{{l}^{-}},F{{e}^{3+}},C{{r}^{3+}}\]
• B. \[N{{a}^{+}}\], \[M{{g}^{2+}}\], \[Al\]
• C. \[Na,\,P,\,\,Cl\]
• D. \[N,\,P,V\]