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: Pathology
[{'content': 'Acute pyelonephritis is diagnosed by? \nSelect and explain. \nA. Focal scar in renal cortex, B. Septicaemia, C. Altered renal function, D. Chills, fever, flank pain', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Classically, acute pyelonephritis has an acute onset with chills, fever, loin pain, lumbar tenderness, dysuria and frequency of micturition.\xa0\nUrine will show abundance of bacteria, pus cells and pus cell casts in the urinary sediment.\xa0\nInstitution of specific antibiotics, after identification of bacteria by culture followed by sensitivity test, eradicates the infection in majority of patients.\n\nMohan H. Textbook of pathology. Jaypee Brothers Medical Publishers; 2015. Edition 7. Page 669', 'role': 'assistant'}]