Specify the coordination geometry around and hybridization of N and B-atoms in a 1:1 complex of BF3:
N:Tetrahedral, sp3 ; B: Tetrahedral, SP3
N:Pyramidal, sp3 ; B:Pyramidal, SP3
N: Pyramidal, sp3 ; B: Planar, SP3
N:Pyramidal, sp3 ; B: Tetrahedral, SP3
in complex [H3N→BF3], both N and B attains sp2−hybridisation and acquires tetrahedral geometry.