The given complex $M(ABCDEF)$ exhibits which of the following isomerism?

Some statements are given below $-$
$(a)$ Coordination compounds $[Pt(NH_3)_3(NCS)]$ and $[Pt(NH_3)_3(SCN)]$ are examples of linkage isomerism.
$(b)$ In the coordination compound $K_4[Ni(CN)_4]$, the oxidation state of nickel is zero.
$(c)$ The hybridization, shape and magnetic moment of $K_3[Cu(CN)_4]$ are respectively $dsp^2$, square planar, $1.73 \ B.M.$
$(d)$ $[Cr(NCS)(NH_3)_5][ZnCl_4]$ exhibits only linkage isomerism.

Excess of $aq. NH_3$ can dissolve

Which of the given statements is incorrect?

$0.02 \, \text{mole}$ of $[Co(NH_3)_5Br]Cl_2$ and $0.02 \, \text{mole}$ of $[Co(NH_3)_5Cl]SO_4$ are present in $200 \, \text{cc}$ of a solution $X$. The number of moles of the precipitates $Y$ and $Z$ that are formed when the solution $X$ is treated with excess silver nitrate and excess barium chloride are respectively:

Which of the following orders is not correct?