Among the following options,select the option in which each complex in Set-$I$ shows geometrical isomerism and the two complexes in Set-$II$ are ionization isomers of each other.
$[en = H_2N-CH_2-CH_2-NH_2]$

• A
  Set-$I$: $[Ni(CO)_4]$ and $[PdCl_2(PPh_3)_2]$
  Set-$II$: $[Co(NH_3)_5Cl]SO_4$ and $[Co(NH_3)_5(SO_4)]Cl$
• B
  Set-$I$: $[Co(en)(NH_3)_2Cl_2]$ and $[PdCl_2(PPh_3)_2]$
  Set-$II$: $[Co(NH_3)_6][Cr(CN)_6]$ and $[Cr(NH_3)_6][Co(CN)_6]$
• C
  Set-$I$: $[Co(NH_3)_3(NO_2)_3]$ and $[Co(en)_2Cl_2]$
  Set-$II$: $[Co(NH_3)_5Cl]SO_4$ and $[Co(NH_3)_5(SO_4)]Cl$
• D
  Set-$I$: $[Cr(NH_3)_5Cl]Cl_2$ and $[Co(en)(NH_3)_2Cl_2]$
  Set-$II$: $[Cr(H_2O)_6]Cl_3$ and $[Cr(H_2O)_5Cl]Cl_2 \cdot H_2O$