ASVAB General Science Practice Test 739434

Question 1 of 5
Blood Types

Blood is categorized into four different types (A, B, AB, and O) based on the type of antigens found on the outside of the red blood cells. Additionally, each type can be negative or positive based on whether or not the cells have an antigen called the Rh factor.

Which of these is not a recognized blood type?

O

AB

AO

B