Fact 1: Veins generally carry deoxygenated blood.

Fact 2: Oxygenated blood is red, deoxygenated blood is blue.

Given the two facts above, answer the question "Veins generally carry what type of blood?" with the following options: 
- oxygen
 - porous
 - blue
 - H 2 O
 - a path
 - SO2
 - liquid
 - nektar


 

   blue      