The ends of three metal rods are examined by bringing end Q of rod 1 near each of the others one at a time. The observations are as follows. End Q attracts end R. End Q attracts end S. End Q attracts end T. End Q repels end U. Which one of the metal rods is the magnet?
- Arod 1 only
- Brod 1 and rod 2
- Crod 1 and rod 3
- Drod 3 only