Question

maglev trains use magnets on the train and guideway to levitate the train off the track. the north pole of the magnets on the train must face the
south pole of the magnets on the guideway so they repel.
south pole of the magnets on the guideway so they attract.
north pole of the magnets on the guideway so they repel.
north pole of the magnets on the guideway so they attract.

Explanation:

Like - poles of magnets repel each other. To levitate the train, there needs to be a repulsive force. So the north pole of the magnets on the train must face the north pole of the magnets on the guideway to create repulsion.

Answer:

north pole of the magnets on the guideway so they repel.