Multiple choice general knowledge

Blood can be classified into how many main types of groups?

  1. Four

  2. Three

  3. Five

  4. None of the above
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A Correct answer
Explanation

Human blood is classified into four main groups based on the ABO system: Type A, Type B, Type AB, and Type O. Each group is determined by the presence or absence of specific antigens on red blood cells. This is a fundamental concept in blood transfusion medicine.

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