Which of the following is/are correct regarding the LHC, CERN laboratory?
1. The Large Hadron Collider is the world’s largest, most powerful particle accelerator.
2. It accelerates particles, mainly protons, to near the speed of light in opposite directions around a 27-km underground ring.
3. The particles are made to collide at four locations, where massive detectors collect data on what happens during the collision.