If untreated, HIV can lead to ___________.

Correct option is C

​The correct answer is (c) AIDS.

Explanation: If left untreated, HIV (human immunodeficiency virus) can lead to:

• AIDS (acquired immunodeficiency syndrome): The most advanced stage of HIV infection.
• Severe neurological disorders: HIV can infect cells that support and protect neurons in the brain, which can lead to a range of neurological conditions.
• Life-threatening illnesses: HIV can damage the immune system, which can lead to severe infections and cancer.​