In the brown ring complex $[\mathrm{Fe}(\mathrm{H}{}_2\mathrm{O}){}_5\mathrm{NO}]{}^{2+}$, treat the nitrosyl ligand as $\mathrm{NO}{}^{+}$ and assume a high-spin arrangement of $d$ electrons. The oxidation state of iron and the spin-only magnetic moment (using $\sqrt{n(n+2)}$) are

1. A$+2$ and $3.87\mathrm{BM}$
2. B$+2$ and $4.90\mathrm{BM}$
3. C$+1$ and $3.87\mathrm{BM}$
4. D$+1$ and $1.73\mathrm{BM}$