Identify the type of isomer shown in the given structure of the coordination compound.

Which complex among the following has the highest value of spin only magnetic moment?
$[Fe(CN)_6]^{3-}, [Fe(CN)_6]^{4-}, [Ni(CN)_4]^{2-}, [NiCl_4]^{2-}$

The spin-only magnetic moment of $[Mn(H_2O)_6]^{2+}$ complex is $........ \ B.M.$ (Nearest integer) (Given: Atomic number of $Mn$ is $25$)

Number of complexes from the following with an even number of unpaired $d$ electrons is . . . . . . . . . .
$[V(H_2O)_6]^{3+}, \quad [Cr(H_2O)_6]^{2+}, \quad [Fe(H_2O)_6]^{3+}, \quad [Ni(H_2O)_6]^{3+}, \quad [Cu(H_2O)_6]^{2+}$
[Given atomic numbers: $V=23, Cr=24, Fe=26, Ni=28, Cu=29$]

The experimental value of the magnetic moment of a $Mn^{2+}$ complex is $5.96 \ BM$. This indicates that:

Total number of stereoisomers of $[Co(acac)_2BrCl]^{\ominus}$ are