In the chromyl chloride test, $\mathrm{K}{}_2\mathrm{Cr}{}_2\mathrm{O}{}_7+4\mathrm{NaCl}+6\mathrm{H}{}_2\mathrm{SO}{}_4\to 2\mathrm{CrO}{}_2\mathrm{Cl}{}_2+2\mathrm{KHSO}{}_4+4\mathrm{NaHSO}{}_4+3\mathrm{H}{}_2\mathrm{O}$. When $0.50\mathrm{mol}$ of $\mathrm{K}{}_2\mathrm{Cr}{}_2\mathrm{O}{}_7$ reacts completely, the amounts of NaCl consumed and $\mathrm{CrO}{}_2\mathrm{Cl}{}_2$ formed are

1. A$2.0\mathrm{mol}$ and $0.50\mathrm{mol}$
2. B$2.0\mathrm{mol}$ and $1.0\mathrm{mol}$
3. C$4.0\mathrm{mol}$ and $1.0\mathrm{mol}$
4. D$1.0\mathrm{mol}$ and $2.0\mathrm{mol}$