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': 'Hand joining sign is characteristic of \nSelect and explain. \nA. Pelviceal duplication, B. Uerterocoele, C. Ureteric duplication, D. Horseshoe kidney', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Both kidneys meet in midline seen has hand joining sign.', 'role': 'assistant'}]