The ends of three metal rods are tested by holding end Q of rod 1 close to the other rods.
The results are as follows:
End Q:
attracts end R
attracts end S
attracts end T
repels end U
Which of the metal rods is a magnet?
rod 1 only
rod 1 and 2 only
rod 1 and 3 only
rod 3 only
