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

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