This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluid and Electrolyte Treatment of Specific Disorders, Subject name: Pediatrics
[{'content': 'At what age extracellular fluid is equal to the intercellular fluid? \nSelect and explain. \nA. 14 days, B. 4 weeks, C. 2 months, D. 3 months', 'role': 'user'}, {'content': "Answer: B \nExplanation: b. 4 weeks(Ref: Avery's 8/e p 373)High Yield Points:In fetus & newborn, ECF volume is larger than ICF volume.Normal postnatal diuresis causes an immediate decrease in the ECF volume.This is followed by continued expansion of ICF volume, which results from cellular growth.By 1 year of age, the ratio of the ICF to ECF volume approaches adult levels.", 'role': 'assistant'}]