Section: Science

17)

There are four blood types in humans: A, B, AB, and O. An individual with blood type A has antibodies for B, so he or she can’t receive type B blood. Similarly, a person with blood type B has antibodies for type A and can’t receive type A blood. A person with AB blood type has no antibodies and can receive blood from anyone. A person with type O blood has both A and B antibodies and can receive blood only from someone else with type O blood. Based on this information, someone with type A blood can donate to

blood groups A and O.
blood groups A and AB.
only blood group O.
only blood group AB.
only blood group A.

Explanation

Someone who has blood type A can donate blood to those who don’t have antibodies for A. These include other people with type A blood (they have antibodies for B only) and those with type AB blood (they don’t have any antibodies).