All of the following are the results of an overreactive immune system to harmless antigens except
a. allergies.
b. aids.
c. lupus.
d. asthma.

The most likely and the most probable answer to this problem together with the choices presented with it is B. AIDS.

Allergies are reactions to certain stuff around the environment. This usually causes rashes and other inflammation of certain parts. Some are just very mild while some become very deadly to the health and life of the person with it. Lupus, on the other hand, is also an inflammatory disease on the skin. Asthma might occur together with an allergy and is usually caused by the interaction to the environment and with an over-active immune system to harmless antigens.

C) they are specialized meaning they are designed to do different things