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': '2 year old child with length 85cm and weight of 11kg was found to have serum urea of 49mg/dl, serum creatinine 2mg/dl What is the estimated GFR of this child, as per Schwartz formula? \nSelect and explain. \nA. 9, B. 18, C. 48, D. 90', 'role': 'user'}, {'content': 'Answer: B \nExplanation: schwartz formula for\xa0creatinine clearance :\n= k\xa0 X\xa0length / serum\xa0creatinine\n( k\xa0= 0.42)\nGFR\xa0= 0.42 X 85/2\xa0= 17.8\xa0≈ 18.', 'role': 'assistant'}]