This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: New Born Infants, Subject name: Pediatrics
[{'content': 'Frequency of renal involvement in Henoch Schonlein purpura is? \nSelect and explain. \nA. 1-5%, B. 5-10%, C. 10-50%, D. 50-70%', 'role': 'user'}, {'content': "Answer: C \nExplanation: c. 10-50%(Ref: Nelson's 20/e p 1216-1217, Ghai 8/e p 632-633)Renal involvement in HSP:It occurs in up to 50% of children with HSPManifests as microscopic hematuria, proteinuria, hypertension, frank nephritis, nephrotic syndrome, and acute or chronic renal failure; Progression to end-stage renal disease is uncommon in children (1-2%)", 'role': 'assistant'}]