This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Embryology, Subject name: Anatomy
[{'content': 'Secretory part of kidney originates from - \nSelect and explain. \nA. Metanephros, B. Ureteric bud, C. Mesonephros, D. Paramesonephric duct', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Metanephros * Kidneys develop from two sources :i) Metanephros (metanephric mesoderm or blastema):# It is the lowest part of nephrogenic cord which is derived from intermediate mesoderm.# It forms the excretory unit of kidney i.e. glomeruls, proximal convoluted tubule, loop ofhenle and distal convoluted tubule.ii) Ureteric bud:# It arises from lower part of mesonephric duct.# It forms collecting part of kidney (pelvis, major calyes, minor calyces, collecting tubules) and ureter.", 'role': 'assistant'}]