Given: For any planner graph $G$
- Number of vertices $(V)=8$
- Number of edges $(E)=13$
- Number of regions/faces$(R/f)=?$
For any connected planner graph $ V+R=E+2$;
$\implies 8+R=13+2$
$\implies R=15-8=7$
$\therefore$ the number of regions in given graph $G$ is $7$
Option $(C)$ is correct.