Understanding Electric Potential

Q.
For setup shown in diagram, find $V_A-V_B$

1. 13 V
2. 16 V
3. 8 V
4. 12 V

Q.
For setup shown in diagram, find $V_A-V_B$

1. 13 V
2. 16 V
3. 8 V
4. 12 V