The correct answer is A. The primary purpose of MRI scans is to see inside a patient's body.
A magnetic resonance imaging (MRI) is a non-invasive technique that uses the phenomenon of nuclear magnetic resonance to obtain information on the structure and composition of the body to be analyzed. This information is processed by computers and transformed into images of the interior of what has been analyzed.
It is used mainly in medicine to observe alterations in the tissues and to detect cancer and other pathologies. It is also used industrially to analyze the structure of both organic and inorganic materials.