Through which medium is HIV primarily transmitted?

• A. By Air
• B. By Water
• C. Blood
• D. Food

Answer: (C)

HIV spreads through contact with certain body fluids that can enter another person’s bloodstream or mucous membranes. These fluids include blood, semen, vaginal and rectal fluids, and breast milk. It does not spread through air, water, or food. The reason blood is the primary medium here is that direct exposure to an infected person’s blood—such as sharing needles or receiving contaminated blood—provides a straightforward way for the virus to enter the bloodstream. While other bodily fluids can carry the virus too, blood represents a classic, high-risk medium for transmission, which is why it’s identified as the answer.