People with type-A blood produce anti-B antibodies without ever being exposed to type-B blood, but Rh-negative individuals produce anti-Rh antibodies only if they are exposed to Rh-positive blood.

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This statement is true. People with type-A blood naturally produce antibodies against type-B blood (anti-B antibodies) even if they have never been exposed to it. However, individuals who are Rh-negative only produce anti-Rh antibodies if they are exposed to Rh-positive blood.

People with Type-A Blood Produce Anti-B Antibodies Without Ever Being