Which method of purification is rspresent by the equations?

$\underset{\left(impure\right)}{\mathrm{Ti}+2{\mathrm{I}}_2}\stackrel{500\mathrm{K}}{⟶}\underset{\left(Pure\right)}{{\mathrm{TiI}}_4}\stackrel{1675\mathrm{K}}{⟶}\mathrm{Ti}+2{\mathrm{I}}_2$

Van Arkel's method includes the following processes,

$\begin{array}{l}\mathrm{Ti}\left(\mathrm{s}\right)+2{\mathrm{I}}_2\left(\mathrm{g}\right)\stackrel{523\mathrm{K}}{⟶}{\mathrm{TiI}}_4\left(\mathrm{g}\right)\\ {\mathrm{TiI}}_4\left(\mathrm{g}\right)\stackrel{1700\mathrm{K}}{\to }\mathrm{Ti}\left(\mathrm{s}\right)+2{\mathrm{I}}_2\left(\mathrm{g}\right)\end{array}$

The Van Arkel method is another name for this procedure. It is applied to the refinement of titanium or zirconium. By heating metal in an evacuated vessel with iodine, oxygen, and nitrogen that are present as impurities are eliminated in this process.

Hence, option C is correct.