The spin-only magnetic moment value of an octahedral complex among CoCl_3 · 4 NH_3, NiCl_2 · 6 H_2 O and PtCl_4 · 2 HCl, which upon reaction with…

The spin-only magnetic moment value of an octahedral complex among $\displaystyle \mathrm{CoCl}_3 \cdot 4 \mathrm{NH}_3$, $\displaystyle \mathrm{NiCl}_2 \cdot 6 \mathrm{H}_2 \mathrm{O}$ and $\displaystyle \mathrm{PtCl}_4 \cdot 2 \mathrm{HCl}$, which upon reaction with excess of $\displaystyle \mathrm{AgNO}_3$ gives $\displaystyle 2$ moles of AgCl is \_\_\_\_ B.M. (Nearest Integer)