This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition, Subject name: Pediatrics
All of the following statements regarding a child with hypernatremic dehydration are true Except 
Select and explain. 
A. There is at least a 10 percent fluid deficit, B. Rapid rehydration is indicated, C. Muscle tone is increased, D. The sensorium fluctuates between lethargy and hyperirritability
B: Rapid rehydration is indicated
Answer: B: Rapid rehydration is indicated 
Explanation: Signs of hypernatremic dehydration include dry rubbery skin, increased muscle tone, and altered level of consciousness. A hypernatremic child should be rehydrated slowly to avoid a rapid reexpansion of intracellular volume that could lead to cerebral edema. A good guide is to replace the fluid deficit over 48 to 72 h. Serum sodium should not be lowered more than 10 to 15 mEq/L over 24 h. Reference: GHAI Essential pediatrics, 8th edition, Nutrition Chapter