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
The most sensitive Indicator of Depletion of intravascular volume in infant is 
Select and explain. 
A. Cardiac output, B. Stroke volume, C. Hea rate, D. Blood pressure
C: Hea rate
Answer: C: Hea rate 
Explanation: The most sensitive indicator of depletion of intravascular volume in infant is Hea rate. Reference: GHAI Essential pediatrics, 8th edition