The observed effective magnetic moment of two octahedral complexes,...

The observed effective magnetic moment of two octahedral complexes, $\mathrm{K}_4\left[\mathrm{Mn}(\mathrm{CN})_6\right] .3 \mathrm{H}_2 \mathrm{O}(\mathrm{X})$ and $\mathrm{K}_4\left[\mathrm{Mn}(\mathrm{SCN})_6\right](\mathrm{Y})$ are 2.18 BM and 6.06 BM , respectively. Which of the following is correct? I. $X$ is a low spin complex with two unpaired electrons II. $Y$ is a high spin complex with 5 unpaired electrons III. $X$ is a high spin complex with two unpaired electrons IV. $Y$ is a low spin complex with 5 unpaired electrons