Question

lupus, a condition in which the body attacks its own cells, is an example of an allergic disorder. an immunodeficiency disorder. a cancer of the immune system. an autoimmune disorder.

Explanation:

• Allergic disorders involve over - reactions to foreign substances (allergens). Lupus is not due to an external allergen.
• Immunodeficiency disorders are when the immune system is weakened and cannot fight off pathogens well. Lupus is not a deficiency but a mis - directed immune response.
• Cancer of the immune system (like leukemia) involves abnormal cell growth in immune cells. Lupus is not a cancer.
• Autoimmune disorders occur when the immune system mistakenly attacks the body's own cells. Lupus fits this definition as the body attacks its own cells.

Answer:

an autoimmune disorder.