This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pancreas, spleen, ureter and kidney, Subject name: Anatomy
[{'content': 'With respect to development of nephron arrange the stages in order of there development: 1.Vesicle stage 2.Pre-tubular aggregates 3.Comma shaped 4.S-shaped \nSelect and explain. \nA. 1-3-4-2, B. 2-3-1-4, C. 1-4-2-3, D. 2-1-3-4', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Kidney develops from metanephros. Pronephros degenerates and never forms functional nephrons. Stages in order of nephron development Ureteric bud Pretubular aggregates Renal vesicle Comma Shaped S Shaped Mature nephron', 'role': 'assistant'}]