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': 'An infant with severe dehydration secondary to diarrhea suddenly presents with proteins and blood in urine. The most probable diagnosis is – \nSelect and explain. \nA. Renal vein thrombosis, B. Pyelonephritis, C. Acute glomerulonephritis, D. Lower nephrosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]