In the van Arkel process, $\mathrm{Ti}(\mathrm{s})+2\mathrm{I}{}_2(\mathrm{g})\to \mathrm{TiI}{}_4(\mathrm{g})$ has $\Delta H^{\circ }=-285.0\mathrm{kJ}$ and $\Delta S^{\circ }=-162.5\mathrm{J}{\mathrm{K}}^{-1}$ (assume both independent of temperature). The temperature above which $\mathrm{TiI}{}_4$ becomes unstable and deposits titanium on the filament is closest to

1. A2436 K
2. B877 K
3. C1754 K
4. D1481 K