A serious disease of the immune system transmitted through blood products especially by sexual contact or contaminated needles.

• A. Entry Level
• B. AIDS (Acquired Immune Deficiency Syndrome)
• C. Depress
• D. Inflation

Answer: (B)

This question is about a serious immune-system condition caused by a virus that spreads through bodily fluids, especially blood and sexual contact, or when sharing contaminated needles. The term that fits this description is AIDS (Acquired Immune Deficiency Syndrome), which is the syndrome that develops after HIV weakens the immune system. HIV attacks immune cells, making it harder for the body to fight infections, and it can be transmitted via blood products, sexual contact, and needle sharing.

The other options don’t describe a disease or transmission route: one is a label that refers to basic or entry level, another is a verb meaning to feel sad, and the last is an economic term.