In the Diagram, the Current in the 3- $\Omega$ Resistor Is 4 A

Multiple Choice

In the diagram, the current in the 3- $\Omega$ resistor is 4 A. The potential difference between points 1 and 2 is:

A) 0.75 V
B) 0.8 V
C) 1.25 V
D) 12 V
E) 20 V