## **Core Concept**
The question tests the understanding of levels of prevention in public health. Levels of prevention include primary, secondary, tertiary, and primordial prevention. Each level has distinct goals, ranging from preventing the emergence of risk factors to managing established disease.

## **Why the Correct Answer is Right**
The scenario describes a camp where people are screened for hypertension by checking blood pressure and for diabetes by checking their BMI and blood sugar levels. This activity involves early detection of diseases (hypertension and diabetes) before the onset of symptoms. Therefore, it falls under **secondary prevention**, which aims to detect and treat problems early before the disease manifests or becomes severe.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is not provided, but typically, A would correspond to a wrong answer.
- **Option B:** Assuming B corresponds to another level of prevention, such as primary, tertiary, or primordial prevention, it would be incorrect because:
- **Primary prevention** involves preventing the disease before it occurs (e.g., vaccination, lifestyle modification to prevent diabetes).
- **Tertiary prevention** involves managing disease after it has developed to prevent further complications (e.g., managing diabetes to prevent nephropathy).
- **Primordial prevention** aims to prevent the emergence of risk factors themselves (e.g., preventing smoking to reduce cardiovascular risk).
- **Option D:** Similarly, D would be incorrect based on the definition not aligning with secondary prevention.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that **screening programs** like the one described are classic examples of secondary prevention. They are crucial for early detection and intervention, potentially reducing the burden of disease in a population. Remembering that "secondary prevention" involves screening and early treatment can help in distinguishing it from other levels of prevention.

## **Correct Answer:** B. Secondary prevention.