Which of the following statement is correct, about "on passing ${\mathrm{H}}_2\mathrm{S}$ gas through acidified ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ solution"?

On passing hydrogen sulfide gas through potassium dichromate milky colour of the solution is obtained. The solution is due to sulphur.

${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7+3{\mathrm{H}}_2\mathrm{S}+4{\mathrm{H}}_2{\mathrm{SO}}_4\to 3\mathrm{S}+{\mathrm{K}}_2{\mathrm{SO}}_4+{\mathrm{Cr}}_2{\left({\mathrm{SO}}_4\right)}_3+7{\mathrm{H}}_2\mathrm{O}$

Hence correct option is C.