$A$ light disc made of aluminium (a nonmagnetic material) is kept horizontally and is free to rotate about its axis as shown in the figure. $A$ strong magnet is held vertically at a point above the disc away from its axis. On revolving the magnet about the axis of the disc,the disc will (figure is schematic and not drawn to scale)-

• A
  rotate in the direction opposite to the direction of magnet's motion
• B
  rotate in the same direction as the direction of magnet's motion
• C
  not rotate and its temperature will remain unchanged
• D
  not rotate but its temperature will slowly rise