Explanation:

Let’s break it down:

- The Ministry of Health and Family Welfare launched the 'Test and Treat Policy' for HIV patients.

- Here’s what this means: The moment someone tests positive for HIV, they start getting treatment right away. There’s no waiting until their immune system weakens or certain symptoms show up.

- Why is this important? It helps control the virus early, keeps people healthier, and cuts down the spread.

- The other options?

- Polio—India focuses on vaccination and surveillance, not a “test and treat” approach.

- Malaria—Diagnosis and treatment are crucial, but there isn’t an all-in-one “test and treat” policy by that name.

- Cancer—Early diagnosis is vital, but treatments depend on specific types and stages; no blanket “test and treat” policy here.

So, option 2—HIV—is the right answer.