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

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

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