This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urinary tract, Subject name: Pediatrics
[{'content': 'Which of the following is an indication for renal biopsy in a child with Nephritic syndrome ? \nSelect and explain. \nA. Age at onset 2-6 years, B. Low blood C3 levels, C. High selective proteinuria, D. Serum albumin less than Ig/dL', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Kidney biopsy is performed on selected patients with kidney disease. Renal biopsy is usually reserved for patients with high or increasing levels of proteinuria, or for patients who have proteinuria along with other signs of renal dysfunction. One example is the nephrotic syndrome. Contraindications for renal biopsies (absolute and relative): a) Solitary kidneys b) Renal mass c) Advanced chronic renal failure d) Active urinary infection e) Uncontrolled hypeension f) Coagulation disorders g) Renal aery aneurysm h) Perinephric abscess i) Horsheshoe kidneys. Reference: GHAI Essential pediatrics, 8th edition', 'role': 'assistant'}]