Specify the coordination geometry around and the hybridisation of `N` and `B` atoms in `1 : 1` complex of `BF_(3)` and `NH_(3)`.
A. N: tetrahedral `sp^(3)`, B: tetrahedral `sp^(3)`
B. N: pyramidal, `sp^(3)`, B : pyramidal `sp^(2)`
C. N: pyramidal, `sp^(3)` , B : planar `sp^(2)`
D. N: pyramidal, `sp^(3)` , B : tetrahedral, `sp^(3)` .
