In which of the following molecules / ions `BF_(3), NO_(2)^(-), H_(2)` the central atom is `sp^(2)` hybridised ?

In which of the following molecules/ions BF_(3), NO_(2),NH_(2) and H_(2)O the central atom is sp^(2) hybridised ?

In which of the following molecular/ions BF_(2),NO_(2)^(-),NH_(2) and H_(2)O the correct atom is sp^(2) hybridized ?

In which of the following molecular/ions BF_(3),NO_(2)^(-),NH_(2)^(-) and H_(2)O the correct atom is sp^(2) hybridized ?