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': 'A 8-year-old boy presents with petechiae, azotemic oliguria and altered sensorium, in casualty. There is a history of diarrhoea for the past 5 days. The clinical diagnosis is – \nSelect and explain. \nA. Acute prophyria, B. Idiopathic thrombocytopenic purpura, C. H.S. purpura, D. H.U.S.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Hemolytic uremic syndrome \n\nHUS is characterized by the triad of -\n\n\nAnaemia (microangiopathic hemolytic anaemia)\nRenal failure (microangiopathy of kidney involving glomerular capillaries and arterioles).\nThrombocytopenia (due to platelet destruction)\n\n\nHUS is common in children under 2 years of age. (But may also occur in older children).\nIt usually follows an episode of acute gastroenteritis.\nThe prodrome is usually of abdominal pain, diarrhoea and vomiting.\nShortly thereafter, signs and symptoms of acute hemolytic anaemia, thrombocytopenia and acute renal failure ensue.\nSometimes neurological findings also occur (But usually absent and differentiates HUS from TTP).', 'role': 'assistant'}]