Everyday Science
NULL
Medium
Question
Human ABO blood is divided into how many groups?
A
Two groups
B
Three groups
C
Four groups
✓ Official correct answer
D
Five groups
Community credibility
Registered members can vote for the answer they believe is correct today and explain why. If the facts change after an election or news event, suggest a new option so others can vote it up.
A
Two groups
No member explanations yet for this option.
B
Three groups
No member explanations yet for this option.
C
Four groups
No member explanations yet for this option.
D
Five groups
No member explanations yet for this option.
Explanation
The ABO system has four groups: A, B, AB and O.
So the correct answer is Four groups.
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