The geometries of the ammonia complexes of $$Ni^{2+}, Pt^{2+}$$ and $$Zn^{2+}$$, respectively, are

A

octahedral, square planar and tetrahedral

B

square planar, octahedral and tetrahedral

C

tetrahedral, square planar and octahedral

D

octahedral, tetrahedral and square planar