In which of the following pairs of molecules/ ions, the central atoms have $sp^2$ hybridization?

Question

( A ) $BF_3 \;and\; NO_2^-$
( B ) $BF_3 \; and \;NH{_2}{^-}$
( C ) $NO{_2}{^-} \;and\; NH_3$
( D ) $NH{_2}{^-} \;and\; H_2O$