$SF _{6} \rightarrow$ Expanded octet molecule

(B) $NO \rightarrow$ Odd Electron molecule

     $H _{2} SO _{4} \rightarrow$ Expanded octet.

(C) $SF _{6} \rightarrow$ Even Electron molecule

      $H _{2} SO _{4} \rightarrow$ Expanded octet.

(D) $BCl _{3} \rightarrow$ Even Electron molecule

      $NO \rightarrow$ Odd Electron molecule

$S \rightarrow 12e^{-}$ in outer orbit.