3. A BBP exposure incident includes contact with blood or OPIM via all except: -Intact skin
-Non-intact skin
-Mucous membrane
- Mouth

Intact skin

Explanation:

Blood borne pathogens not considered a threat unless the skin (human largest organ) is broken/not intact.

b is the best answer for this question.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex