One of the major disadvantages of MRI is its dangerous magnetic fields. The correct option is C.
Magnetic resonance imaging (MRI) is a sort of imaging that generates detailed pictures of the inside of body by using strong magnetic fields and radio waves.
An MRI scanner is a large tube with powerful magnets inside. During the scan, person will be lying inside the tube.
Its magnetic fields are somewhat harmful for the person as it can lead to various future consequences.
Thus, the correct option is C.
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