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': 'True statement about pyelonephritis in children: \nSelect and explain. \nA. Neonates can have non-specific symptoms, B. Flank pain a common finding, C. Should be suspected in all children <2 years of age with fever due to unknown cause, D. All of these', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. All of theseAcute pyelonephritis is considered one of the most serious bacterial infections, especially in children <2 years of age having fever due to an unknown cause. Children with acute pyelonephritis often have severe flank pain, fever, nausea and vomiting. Neonates can however present with non-specific symptoms.', 'role': 'assistant'}]