$1.34\mathrm{g}$ of anhydrous $\mathrm{Na}{}_2\mathrm{C}{}_2\mathrm{O}{}_4$ (Na 23, C 12, O 16) is warmed with excess concentrated $\mathrm{H}{}_2\mathrm{SO}{}_4$. The gas mixture is passed through excess concentrated KOH solution and the leftover dry gas is collected at STP (molar volume $22.4L/mol$). Its volume is:

1. A$112\mathrm{mL}$
2. B$336\mathrm{mL}$
3. C$448\mathrm{mL}$
4. D$224\mathrm{mL}$