Answer:
(3) protons
Explanation:
Magnetic fields are produced by charged particles in motion. Let's analyze each option:
(1) x rays --> they consist of photons, which are neutral particles, so they don't produce magnetic fields
(2) gamma rays --> they consist of photons, which are neutral particles, so they don't produce magnetic fields
(3) protons --> protons are charged particles, so they can produce magnetic fields if they are in motion
(4) neutrons --> neutrons are neutral particles, so they don't produce magnetic fields
