Review Of Related Disease (RRD) 4 Practice Exam

Which blood type has A, B, and Rh antigens present?

AB- O+ AB+ A+

Correct Answer:

AB+

Explanation:

The presence of A and B antigens on red blood cells, along with the Rh(D) antigen, defines AB positive. This is the only blood type that carries both A and B antigens and is Rh positive, so it uniquely has all three markers. If any one of those antigens is missing—A or B or Rh—the type would be different (for example, lacking Rh means negative, or lacking one of A/B means the absence of that antigen).

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