Which of the following pair of species are iso-electronic ?

Which of the following pair of species are isodiaphers?

Which of the following pair of species are isodiaphers?

In which of the following pairs, the ions are iso-electronic ?

Which of the following pairs of species are isostructural ?

Which of the following pairs of species are isostructural ?

In which of the following pairs, the ions are iso electronic

In which of the following pairs, the two species are iso-structural ? {:((a)SO_(4)^(2-)and NO_(3)^(-),(b),BF_(3)andNF_(3)),((c )BrO_(3)^(-)and XeO_(3),(d),SF_(4)and XeF_(4)):}