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: Anatomy
[{'content': 'Development of the urinary bladder is from? \nSelect and explain. \nA. Urogenital Sinus, B. Paramesonephric Duct, C. Metanephric Blastema, D. Proctodaeum', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Urogenital SinusThe urinary bladder (except trigone) is derived from vesicourethral canal, cranial pa of urogenital sinus (endodermal).Trigone is derived from absorbed pa of Wolffian duct/mesonephric duct (mesodermal).", 'role': 'assistant'}]