Multiple choice general knowledge science & technology

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

  1. Four

  2. Three

  3. Five

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The ABO blood group system classifies human blood into four main types based on the presence or absence of A and B antigens: Type A has A antigens, Type B has B antigens, Type AB has both, and Type O has neither. This classification is crucial for safe blood transfusion, as mixing incompatible blood types can cause dangerous immune reactions.

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