This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': 'The most sensitive indicator of depletion of intravascular volume in infant is- \nSelect and explain. \nA. Cardiac output, B. Stroke volume, C. Hea rate, D. Blood pressure', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Hea rate o An increase in hea rate is the earliest and the most sensitive indicator to any reduction in intravascular volume.", 'role': 'assistant'}]