An industrial magnetic separator is used to remove ferromagnetic debris from a conveyor belt carrying crushed non-magnetic material. As shown in the diagram below, a large, rectangular Alnico block is suspended above the belt. A small iron scrap fragment is pulled upward by the magnetic field and remains suspended in the air gap.
Which row in the table correctly describes the magnetic properties of the Alnico block and the suspended iron scrap fragment?
Alnico blockIron scrap fragmentAInduced magnetPermanent magnetBInduced magnetInduced magnetCPermanent magnetInduced magnetDPermanent magnetPermanent magnet \begin{array}{c|c|c} \hline & \text{Alnico block} & \text{Iron scrap fragment} \\ \hline \textbf{A} & \text{Induced magnet} & \text{Permanent magnet} \\ \textbf{B} & \text{Induced magnet} & \text{Induced magnet} \\ \textbf{C} & \text{Permanent magnet} & \text{Induced magnet} \\ \textbf{D} & \text{Permanent magnet} & \text{Permanent magnet} \\ \hline \end{array} ABCDAlnico blockInduced magnetInduced magnetPermanent magnetPermanent magnetIron scrap fragmentPermanent magnetInduced magnetInduced magnetPermanent magnetRow A\textbf{A}A
Row B\textbf{B}B
Row C\textbf{C}C
Row D\textbf{D}D