Of the following sets which one does NOT contain isoelectronic species

1.	Of the following sets which one does NOT contain isoelectronic species [AIEEE 2005]
A.	\[PO_{4}^{3-},\,SO_{4}^{2-},\,ClO_{4}^{-}\]
B.	\[C{{N}^{-}},\,{{N}_{2}},\,C_{2}^{2-}\]
C.	\[SO_{3}^{2-},\,CO_{3}^{2-},\,NO_{3}^{-}\]
D.	\[BO_{3}^{3-},\,CO_{3}^{2-},\,NO_{3}^{-}\]
Answer» D. \[BO_{3}^{3-},\,CO_{3}^{2-},\,NO_{3}^{-}\]

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