What electrical safety procedure is described below: if you are going to work on something electrical, you should first disconnect it completely from its electrical source. then you have to make sure that the electricity cannot be reconnected by you or anyone else until it is safe again.
a. lockout/tagout
b. over current protection
c. shocking current
d. shut down

The answer is A. Lockout/Tagout

Logout/Tagout that is recommended by Occupational Safety and Health Organization in order to control hazardous energy

The Lockout/Tagout standard established for the employer in order to prevent occupational incident from hazardous energy

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.