## **Core Concept**
The reduced osmolarity Oral Rehydration Solution (ORS) is a type of solution used to treat dehydration caused by diarrhea. Its osmolarity is crucial for effective rehydration without causing additional stress to the body. The World Health Organization (WHO) and UNICEF have recommended a reduced osmolarity ORS.

## **Why the Correct Answer is Right**
The correct osmolarity of the reduced osmolarity ORS, as recommended by the WHO and UNICEF, is **245 mOsm/L**. This reduction in osmolarity helps in better absorption of fluids and electrolytes by the intestines, reducing the osmotic load and making it more effective and safer for patients of all ages. The solution contains sodium chloride, glucose, potassium chloride, and citrate in specific amounts to achieve this osmolarity.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Not provided, hence cannot be evaluated.
- **Option B:** Not provided, hence cannot be evaluated.
- **Option D:** Not provided, hence cannot be evaluated.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the reduced osmolarity ORS has significantly improved the management of diarrhea-related dehydration. Its composition is designed to match the osmolarity of body fluids more closely than the original formula, reducing the risk of osmotic imbalance.

## **Correct Answer:** B. 245 mOsm/L.