In the following chemical reaction:

${\mathrm{TiCl}}_4+\mathrm{Na}⟶M+\text{ compound }$

M (Metal) is purified by :

The Van-Arkel process is used to purify metals like Ti or Zr. A little amount of iodine is used to heat the metal, which transforms it into volatile tetraiodide. This tetraiodide is then electrically heated over 1800K with a tungsten filament, decomposing it into pure metal, which is then deposited on a tungsten filament.

The balanced reaction equation is,

${\mathrm{TiCl}}_4+4\mathrm{Na}\to \mathrm{Ti}+4\mathrm{NaCl}$

Hence, option A is correct.