This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urogenital system, Subject name: Radiology
[{'content': 'All are the radiological sings of Urogenital TB Except \nSelect and explain. \nA. "Smudeged Papillae" and "Moth eaten Calyx", B. "Putty Kidney", C. "Saw tooth Ureter", D. "Enlarged Bladder\'', 'role': 'user'}, {'content': 'Answer: D \nExplanation: SIGNS OF UROGENITAL TB: Smudged" papillae= irregularities of the surface of papillae "Moth-eaten" calyx=caliceal erosion (early change) "Putty kidney" "Saw-tooth ureter", "beaded ureter"= alternating areas of strictures +dilatations "Corkscrew ureter"= marked touosity with strictures+dilatations "Pipestem ureter"= rigid a peristaltic sho thick "Shrunken /thimble bladder"', 'role': 'assistant'}]