Which of the following statements is correct?

Which of the following complexes is diamagnetic and tetrahedral?

Match the following Column-$I$ (Reaction) with Column-$II$ (colour of the product or nature):

Column-$I$ (Reaction)	Column-$II$ (colour of the product or nature)
$(A)$ $FeCl_3(aq) + NH_3(aq) \rightarrow$	$(I)$ Green ppt
$(B)$ $AgCl(aq) + NH_3(aq) \rightarrow$	$(II)$ Deep blue
	$(III)$ Brown ppt
	$(IV)$ Colourless solution

The correct answer for the sequence $(A, B)$ is:

Which of the following statement is/are $TRUE$?

$CuSO_{4(aq)}$ $\xrightarrow{H_2S \uparrow} M \downarrow$ $\xrightarrow[\text{Excess}]{KCN} N + O$
Then final products $N$ and $O$ are respectively.

List-$I$ contains metal species and List-$II$ contains their properties.

List-$I$	List-$II$
$I$. $[Cr(CN)_6]^{4-}$	$P$. $t_{2g}$ orbitals contain $4$ electrons
$II$. $[RuCl_6]^{2-}$	$Q$. $\mu$ (spin-only) $= 4.9 \ BM$
$III$. $[Cr(H_2O)_6]^{2+}$	$R$. low spin complex ion
$IV$. $[Fe(H_2O)_6]^{2+}$	$S$. metal ion in $4+$ oxidation state
	$T$. $d^4$ species

[Given: Atomic number of $Cr = 24, Ru = 44, Fe = 26$] Match each metal species in List-$I$ with their properties in List-$II$,and choose the correct option.