MRI magnet is a: (A) Ferromagnet, (B) Paramagnet, (C) Simple magnet, (D) Superconducting-magnet
Answer is D. MRI uses a Superconducting magnet which is kept cool using Helium. A superconducting MRI magnet comprises a steel cryostat with the superconducting coils immersed in liquid helium at 4.2 Kelvin (-269degC or -452degF).