c
(a) \(S F_{4}=\) irregular tetrahedral \((sp^{3}d\), one lone pair)

\(X e F_{4}=\) square planar \(( sp^{3} d^{2},\) two lone pairs)

(b) \(S O_{3}^{2-}=\) pyramidal \(( sp^{3},\) one lone pair)

\(N O_{3}^{-}=\) trigonal planar \(\left(s p^{2}\right)\)

(c) \(B F_{3}=\) trigonal planar \(\left(s p^{2}\right)\)

\(N F_{3}=\text { pyramidal }\left(s p^{3}\right)\)

(d) \(B r O_{3}^{-}=\) pyramidal \((s p^{3},\) one lone pair)

\(X e O_{3}=\) pyramidal \(( s p^{3},\) one lone pair)