Specify the co-ordination geometry around and hybridisation of `N` and ` B` complex of `NH_3` and `BF_3`,

Options

A. `N:` tetrahedral, `sp^(3), B:` tetrahedral, `sp^(3)`
B. `N:` pyraidal, `sp^(3),B:` pyramidal, `sp^(3)`
C. `N:` pyramidal, `sp^(3),B:` planar, `sp^(2)`
D. `N:` pyramidal, `sp^(3),B:` tetrahedral, `sp^(3)`

Answer

a