The average person in the United States is exposed to the following amount of radiations annually. Rank the following source of radiation in the increasing order of their ability to cause harm to living tissue.
Here is the table that was provided:

Weapons-test fallout 1 millirem
Cosmic radiation 26 millirems
Air (radon-222) 0.198 rems
Diagnostic X rays 0.040 rems
Television tubes 11 millirems
Nuclear medicine 0.015 rems
Ground 33 millirems

Rank from highest to lowest. To rank items as equivalent, overlap them.
Here are the choices:
Air (radon 222) Nuclear Medicine, Diagnostic X rays, Weapons-test fallout, TV tubes.

Question

The average person in the United States is exposed to the following amount of radiations annually. Rank the following source of radiation in the increasing order of their ability to cause harm to living tissue.
Here is the table that was provided:

Weapons-test fallout	1 millirem
Cosmic radiation	26 millirems
Air (radon-222)	0.198 rems
Diagnostic X rays	0.040 rems
Television tubes	11 millirems
Nuclear medicine	0.015 rems
Ground	33 millirems

Rank from highest to lowest. To rank items as equivalent, overlap them.
Here are the choices: 
Air (radon 222) Nuclear Medicine, Diagnostic X rays, Weapons-test fallout, TV tubes.