This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Development of GU system and Neuro-vascular supply of pelvis & perineum, Subject name: Anatomy
[{'content': 'When does the metanephros become functional? \nSelect and explain. \nA. At week 3 of development, B. At week 4 of development, C. At week 10 -12 of development, D. Just before bih', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The metanephros begins to form at week 5 and stas to function in the fetus at about week 10-12 The pronephros is not functional in humans. The mesonephros leaves behind mesonephric duct & gets degenerated.', 'role': 'assistant'}]