## **Core Concept**
The Oral Rehydration Solution (ORS) is a type of fluid replacement used to prevent and treat dehydration, especially due to diarrhea. It contains specific amounts of salts and sugars to help the body absorb fluids. The solution's effectiveness and safety depend on its proper use and storage.

## **Why the Correct Answer is Right**
The correct answer, , indicates that ORS should be discarded after 24 hours. This is because ORS, once opened or prepared, can become contaminated with bacteria or other pathogens, especially in tropical environments or when hygiene practices are not optimal. Such contamination can lead to infections or worsen the patient's condition. The World Health Organization (WHO) and other health authorities recommend discarding ORS after 24 hours to minimize the risk of bacterial contamination.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option suggests discarding ORS after 12 hours, which, although cautious, is not typically recommended by guidelines.
- **Option B:** This option suggests discarding ORS after 48 hours, which is longer than the generally recommended period and could increase the risk of contamination.
- **Option D:** This option suggests discarding ORS after 72 hours (3 days), which is even more risky in terms of potential bacterial contamination.

## **Clinical Pearl / High-Yield Fact**
A critical point to remember is that ORS is a cost-effective and lifesaving intervention for dehydration caused by diarrhea and other conditions. Proper storage and handling, including discarding the solution after 24 hours, are crucial for its safe use. Always use clean water and follow the WHO's or a healthcare provider's guidelines for preparing ORS.

## **Correct Answer:** . 24 hours.