AIDS stands for which full form?

• A. Autoimmune Immunodeficiency Syndrome
• B. Acquired Immune Deficiency Syndrome
• C. Autoimmune Disease Syndrome
• D. Autoimmune Deficiency Syndrome

Answer: (D)

Acquired Immune Deficiency Syndrome is the full form. Acquired means it develops after birth, typically following HIV infection. Immune refers to the body's defense system. Deficiency indicates a severe reduction in immune function, making the body vulnerable to infections. Syndrome signals a group of problems that appear together due to this weakened immunity. HIV damages the immune system, especially the CD4 T cells, so people with AIDS are prone to opportunistic infections and certain cancers. This is different from autoimmune conditions, where the immune system mistakenly attacks the body's own tissues. The other options mix up autoimmune terminology with immune deficiency, which is why they don’t fit.