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: Surgery
[{'content': 'In acute pyelonephritis, which of the following is not a USG finding: \nSelect and explain. \nA. Increased vascularity, B. Renal enlargement, C. Compression of the renal sinuses, D. Increased echogenecity', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]