This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluid and electrolytes, Subject name: Pediatrics
Severe dehydration in an older child occurs when the fluid loss is 
Select and explain. 
A. 1% of body weight, B. 4% of body weight, C. 6% of body weight, D. 9% of body weight
D: 9% of body weight
Answer: D: 9% of body weight 
Explanation: Signs of mild or moderate dehydration include: Thirst. Dry or sticky mouth. Signs of severe dehydration include: Not peeing or having very dark yellow pee. Very dry skin. Feeling dizzy. Rapid heabeat. Rapid breathing. Sunken eyes. Sleepiness, lack of energy, confusion or irritability. Fainting. Reference: GHAI Essential pediatrics, 8th edition