Which of the following statements is correct?

Which one of the following ions is not tetrahedral in shape?

Geometrical shapes of the complexes formed by the reaction of $Ni^{2+}$ with $Cl^{-}$,$CN^{-}$,and $H_2O$,respectively,are

The statements that are incorrect about the nickel$(II)$ complex of dimethylglyoxime are:
$A$. It is red in colour
$B$. It has a high solubility in water at $pH = 9$
$C$. The $Ni$ ion has two unpaired $d$-electrons
$D$. The $N - Ni - N$ bond angle is almost close to $90^{\circ}$
$E$. The complex contains four five-membered metallacycles (metal containing rings)
Choose the correct answer from the options given below:

The ammine complexes of metal ions $Cu^{2+}$,$Ni^{2+}$ and $Zn^{2+}$ have shapes respectively:

The hybridization and magnetic nature of $[Mn(CN)_6]^{4-}$ and $[Fe(CN)_6]^{3-}$,respectively are