To diagnose the medical conditions, MRI technique is used. Which is not used in MRI?

Correct answer: (e) None of the above/More than one of the above

Explanation

MRI (magnetic resonance imaging) makes pictures of the inside of the body with a strong magnetic field and radio waves.

It uses neither X-rays nor gamma rays (both are ionising radiations), so two options are "not used": the answer is "More than one of the above".