Feeling slightly uncomfortable during exercise
a. can indicate that there's a problem with your heart.
b. is a signal that something is wrong.
c. means that you're completely out of shape.
d. is completely normal and is to be expected.

The back of the package where the nutrition label is

Unlike  ct scans, which use x-rays,  mri scans  use powerful magnetic fields and radio frequency pulses to produce detailed pictures of organs, soft tissues, bone and other internal body structures.  differences between  normal and abnormal tissue is often clearer on an  mri  image than a  ct.you can see more with a mri scan. for example on an mri you can see internal bleeding.