Q. Which one of the following techniques is safest for the detection of cancers?
A) Magnetic resonance imaging (MRI)
B) Radiography (X-ray)
C) Computed tomography (CT)
D) Histopathological studies
Explanation
[Solution from source] MRI uses strong magnetic fields and non-ionising radiation, so it does not damage DNA the way X-rays do. Radiography and CT both use ionising X-rays, which can themselves cause mutations. Histopathology is accurate but needs a biopsy, which is an invasive procedure. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.