This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urogenital System, Subject name: Anatomy
[{'content': 'Trigone of bladder is derived from - \nSelect and explain. \nA. Mesonephric duct, B. Paramesonephric duct, C. Absorbed anal membrane, D. Mullerian duct', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Mesonephric duct o The urinary bladder (except trigone) is derived from vesicourethral canaL cranial part of urogenital sinus (endodermal).o Trigone is derived from Absorbed part of Wolffian duct/mesonephrk duct (mesodermal).", 'role': 'assistant'}]