A metal rod moves at a constant velocity in a direction perpendicular to its length. A constant, uniform magnetic field exists in space in a direction perpendicular to the rod as well as its velocity. Select the correct statement from the following.

• A. The entire rod is at the same electric potential.
• B. There is an electric field in the rod.
• C. The electric potential is highest at the centre of the rod and decreases towards its ends.
• D. The electric potential is lowest at the centre of the rod, and increases towards its ends