## Core Concept
The management of severe dehydration in pediatric patients, especially infants, requires careful consideration of fluid resuscitation to correct the fluid deficit and maintain ongoing losses. The World Health Organization (WHO) plan for the treatment of dehydration is commonly used and recommends the amount of fluid to be given based on the degree of dehydration and the child's weight.

## Why the Correct Answer is Right
For a child with severe dehydration, the WHO recommends giving 120-150 mL/kg of fluid over the first 6 hours for rehydration. For an 8-month-old baby weighing 10 kg, the total amount of fluid for rehydration would be calculated as 10 kg * 120 mL/kg = 1200 mL or 10 kg * 150 mL/kg = 1500 mL over 6 hours. The correct answer, 100-150 mL/kg, aligns with these guidelines, specifically targeting the higher end for severe dehydration.

## Why Each Wrong Option is Incorrect
- **Option A:** Less than 100 mL/kg would be insufficient for treating severe dehydration, potentially leading to inadequate correction of fluid deficits.
- **Option B:** More than 150 mL/kg might be excessive and could lead to fluid overload, especially if not carefully monitored.
- **Option D:** A range not specifically aligned with the standard treatment protocols for severe dehydration.

## Clinical Pearl / High-Yield Fact
A key point to remember is that the treatment of dehydration, especially severe dehydration, involves not just the volume of fluid but also the rate of administration and the type of fluid (e.g., isotonic solutions like 0.9% saline or balanced crystalloids). Monitoring the child's response (e.g., urine output, improvement in vital signs) is crucial.

## Correct Answer Line
**Correct Answer: C. 100-150 mL/kg.**