In Cu-ammonia complex, the state of hybridisation of Cu2+ is
sp3
d3s
sp2f
dsp2
A.
sp3
Cu-ammonia complex is [Cu(NH3)4]2+
square planar geometry
NH3, being strong field ligand, shifts the unpaired electron to higher level.
What is the correct electronic configuration of the central atom in K4[Fe(CN)6] based on crystal field theory