In a Young Individual Who Has Never Been Exposed to a Blood

question 22

Multiple Choice

In a young individual who has never been exposed to a blood transfusion,why does A-type blood have anti-B antibody,while B-type blood has anti-A antibody?

• A)The fetus is exposed to the mother's blood antigens during pregnancy.
• B)All individuals already have all possible antibodies at birth so this is normal.
• C)That antibodies develop to A and B epitopes on intestinal microorganisms in the intestine.
• D)The antibodies are transferred in the saliva from parent to child.
• E)The antibodies are made to the recessive blood type that is not expressed.

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