The Figure Shows A $p V$ Diagram For $0.98$ Mol of Ideal Gas That Undergoes the Process

The figure shows a $p V$ diagram for $0.98$ mol of ideal gas that undergoes the process $1 \rightarrow 2$ . The gas then undergoes an isochoric heating from point 2 until the pressure is restored to the value it had at point 1. What is the final temperature of the gas? $( R = 8.31 \mathrm {~J} / \mathrm { mol } \cdot \mathrm { K } )$ .

A) $380 ^ { \circ } \mathrm { C }$
B) $110 ^ { \circ } \mathrm { C }$
C) $- 160 ^ { \circ } \mathrm { C }$
D) $12 ^ { \circ } \mathrm { C }$