In which of the following pairs, the two species are not isostructural

1.	In which of the following pairs, the two species are not isostructural?
A.	\[C{{O}^{2-}}_{3}\,and\,N{{O}^{-}}_{3}\]
B.	\[PC{{l}^{+}}_{4}\,and\,SiC{{l}^{{}}}_{4}\]
C.	\[P{{F}_{5}}\,and\,Br{{F}_{5}}\]
D.	\[Al{{F}^{3-}}_{6}\,and\,S{{F}_{5}}\]
Answer» D. \[Al{{F}^{3-}}_{6}\,and\,S{{F}_{5}}\]

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In which of the following pairs, the two species are not isostructural?

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